STUDY OF LANGAUGES

write a class to represent a vector (a series of float values). Include member functions to perform the following tasks:

2011-04-07T22:52:00.000-07:00

1)To Create the Vector
2)To modify the value of a given element
3)To multiply by a scalar value.
4)To display the vector in the form (10,20,30....)
Write a program to test your class*/

#include <iostream.h>
#include <conio.h>

int const size=50;

class vector
{
float d[size];
int s;
public:
void create(void);
void modify(void);
void multiply(void);
void display(void);
};

void vector :: create(void)
{
cout<<"\n\nEnter of Array you want to create:-";
cin>>s;
cout<<"Enter "<<s<<" Real Numbers\n";
for(int i=0;i<s;i++)
       cin>>d[i];
}

void vector :: modify(void)
{
int mfy_value;
float with;
cout<<"\nEnter Value is to be modified:-";
cin>>mfy_value;
cout<<"Enter Value with which you want to Replace:-";
cin>>with;
int search=0;
for(int i=0;search<s;i++)
{
    if(mfy_value==d[i])
       {
      d[i]=with;
      }
   search=i+1;
}
}

void vector :: multiply(void)
{
int mul;
cout<<"\nEnter value with which you want to multiply:-";
cin>>mul;
for(int i=0;i<s;i++)
    d[i]=d[i]*mul;
}

void vector :: display(void)
{
cout<<"\n\nDisplay of Array\n";
cout<<"(";
for(int i=0;i<s;i++)
{
    cout<<d[i];
   if(i!=s-1)
       cout<<",";
}
cout<<")";
}

void main()
{
clrscr();
vector o1;
int choice;
do
{
cout<<"\n\nChoice List\n";
cout<<"1)    To Create Vector Array\n";
cout<<"2)    To Modify Array\n";
cout<<"3)    To Multiply with Scalar value\n";
cout<<"4)    To Display\n";
cout<<"5)    EXIT\n";
cout<<"Enter your choice:-";
cin>>choice;
switch(choice)
{
case 1:    o1.create();
    break;
case 2:    o1.modify();
    break;
case 3: o1.multiply();
    break;
case 4: o1.display();
    break;
case 5:goto end;
}
}while(1);
end:
}

Unary Operator minus

2011-04-07T22:51:00.005-07:00

#include <iostream.h>
#include <conio.h>

class minus
{
int d1,d2,d3;
public:
minus()
{d1=d2=d3=0;}
minus(int a,int b,int c)
{
   d1=a;
   d2=b;
   d3=c;
}
void display(void)
{
    cout<<d1<<" "<<d2<<" "<<d3;
}
void operator - ()
{
    d1=-d1;
    d2=-d2;
    d3=-d3;
}
};

void main()
{
clrscr();
minus o1,o2(2,4,6);

-o1;
cout<<"\nData of Object 1 : ";
o1.display();

-o2;
cout<<"\n\nData of Object 2 : ";
o2.display();

getch();
}

Triangle

2011-04-07T22:50:00.003-07:00

#include<conio.h>
#include<iostream.h>
#include<iomanip.h>
void main()
{
int i,j,num,c;
clrscr();
cout<<"Enter number:-";
cin>>num;
cout<<setw(num+2)<<"*\n";
for(c=2,i=num;i>0;i--)
{
    cout<<setw(i)<<"*";

    for(j=1;j<=1;j++)
   {
    cout<<setw(c)<<"*";
   }
c=c+2;
cout<<"\n";
}
getch();
}

DYNAMIC MEMORY ALLOCATION

2011-04-07T22:50:00.001-07:00

#include <iostream.h>
#include <conio.h>

class matrix
{
int ***p,d1,d2,d3;
public:
matrix(){}
matrix(int a,int b,int c);
void getdata();
void display();
};

matrix :: matrix(int a,int b,int c)
{
d1=a;
d2=b;
d3=c;
p=new int **[d1];
for(int i=0;i<d1;i++)
{
    p[i]=new int *[d2];
    for(int j=0;j<d2;j++)
    p[i][j]=new int [d3];
}
}

void matrix :: getdata(void)
{
cout<<"\n\nEnter data "<<d1<<"*"<<d2<<"*"<<d3<<" data\n";
for(int i=0;i<d1;i++)
{
    for(int j=0;j<d2;j++)
    {
     for(int k=0;k<d3;k++)
    cin>>p[i][j][k];
     }
}
}

void matrix :: display(void)
{
   cout<<"\n\n\nDisplay function\n";
   for(int i=0;i<d1;i++)
{
    for(int j=0;j<d2;j++)
    {
     for(int k=0;k<d3;k++)
    cout<<p[i][j][k];
     }
     cout<<endl;
}
}

void main()
{
clrscr();
matrix o1;
o1.getdata();
o1.display();
getch();
}

Class Template for vector operations.

2011-04-07T22:49:00.001-07:00

#include <iostream.h>
#include <conio.h>

template <class T>
class vector
{
    T *arr;
    int size;

    public:

    vector() {
       arr=NULL;
       size=0;
    }

    vector(int m);
    vector(T *a,int n);
    void modify(T value,int index);
    void multiply(int scalarvalue);
    void display();
};

template <class T>
vector<T> :: vector(int m)
{
   size=m;
   arr = new T[size];
   for(int i=0;i<size;i++)
       arr[i]=0;
}

template <class T>
vector<T> :: vector(T *a,int n)
{
   size=n;
   arr = new T[size];
   for(int i=0;i<size;i++)
       arr[i]=a[i];
}

template <class T>
void vector<T> :: modify(T value,int index)
{
    arr[index]=value;
}

template <class T>
void vector<T> :: multiply(int scalarvalue)
{
    for(int i=0;i<size;i++)
       arr[i] = arr[i] * scalarvalue;
}

template <class T>
void vector<T> :: display()
{
    cout<<"(";
    for(int i=0;i<size;i++)
    {
        cout<<arr[i];
        if(i!=size-1)
           cout<<", ";
    }
    cout<<")";
}

void main()
{
    clrscr();

    //Creating Integer Vector.
    int iarr[]={1,2,3,4,5};
    vector <int> v1(iarr,5); //Integer array with 5 elements.
    cout<<"\nInteger Vector : ";
    v1.display();
    cout<<"\n\nModify index 3 with value 15\n";
    v1.modify(15,3); //modifying index 3 with value 15.
    cout<<"After Modification : ";
    v1.display();
    cout<<"\n\nMultiply with scalar value : 10\n";
    v1.multiply(10); //Multiply with scalar value 10.
    cout<<"After Multiplying : ";
    v1.display();
    cout<<"\n\n";

    //Creating double Vector.
    double darr[]={1.1,2.2,3.3,4.4,5.5};
    vector <double> v2(darr,5); //Double array with 5 elements.
    cout<<"\nDouble Vector : ";
    v2.display();
    cout<<"\n\nModify index 0 with value 9.9 \n";
    v2.modify(9.9,0); //modifying index 0 with value 9.9.
    cout<<"After Modification : ";
    v2.display();
    cout<<"\n\nMultiply with scalar value : 10\n";
    v2.multiply(10); //Multiply with scalar value 10.
    cout<<"After Multiplying : ";
    v2.display();
    cout<<"\n\n";

    getch();

}

Template for finding Minimum value in an array

2011-04-07T22:48:00.004-07:00

#include <iostream.h>
#include <conio.h>

template <class T>
T findMin(T arr[],int n)
{
    int i;
    T min;
    min=arr[0];
    for(i=0;i<n;i++)
    {
         if(min > arr[i])
        min=arr[i];
    }
    return(min);
}

void main()
{
    clrscr();
    int iarr[]={5,4,3,2,1};
    char carr[]={'z','y','c','b','a'};
    double darr[]={3.3,5.5,2.2,1.1,4.4};

    //calling Generic function...to find minimum value.
    cout<<"Generic Function to find Minimum from Array\n\n";
    cout<<"Integer Minimum is : "<<findMin(iarr,5)<<"\n";
    cout<<"Character Minimum is : "<<findMin(carr,5)<<"\n";
    cout<<"Double Minimum is : "<<findMin(darr,5)<<"\n";

    getch();
}

sum of 10 integers

2011-04-07T22:48:00.002-07:00

#include <iostream.h>
#include <conio.h>

class addition
{
int data;
public:
addition()     //constructor
{data=0;}

void getdata(addition o1)
{cout<<"\nEnter Your Data :-";
    int sum;
    cin>>sum;
   data=data+sum;
}

void display(void)
{    cout<<"\nSum of Data is :-"<<data;}
};

void main()
{

String concatenation using + operator //String Comparision using <= operator

2011-04-07T22:48:00.000-07:00

#include <iostream.h>
#include <string.h>
#include <conio.h>

class string
{
char *p;
int len;
public:
   string()
   {}

   string(char *a)
   {
    len=strlen(a);
    p=new char[len+1];
    strcpy(p,a);
   }

   string operator + (string o2)
   {
      string temp;
      temp.len=len+o2.len;
      temp.p = new char[temp.len + 1];
     strcpy(temp.p,p);
     strcat(temp.p,o2.p);
     return temp;
   }

   int operator <= (string o2)
    {
       if(len <= o2.len)
          return(1);
       else
          return(0);
    }

   void display(void)
   {
     cout<<p;
   }
};

void main()
{
clrscr();
string o1("Vivek"),o2("Patel"),o3;

o1.display();
cout<<endl;
o2.display();
cout<<endl<<endl;

o3=o1+o2;

cout<<"After String Concatenation : ";
o3.display();
cout<<endl<<endl<<endl;

string s1("New Delhi"),s2("New York");
if(s1<=s2)
{
    s1.display();
    cout<<" is smaller than ";
    s2.display();
}
else
{
    s2.display();
    cout<<" is smaller than ";
    s1.display();
}

getch();
}

Three steps for Polar cordinates

2011-04-07T22:46:00.003-07:00

//1)convert points to rectangular cordinates
//2)Addition of Points
//3)Converting Back to Polar cordinates

#include <iostream.h>
#include <math.h>
#include <conio.h>

class polar
{
double radius;
double angle;

double getx()
    {return radius*cos(angle);} //These two function
double gety()                 //convert this polar objects
    {return radius*sin(angle);} //into x and y rectangular coords

public:
   polar()
   {radius=0.0;angle=0.0;}

   polar(float r,float a)
    {
      radius=r;
      angle=a;
    }

   void display()
    {
      cout<<"("<<radius<<", "<<angle<<")";
    }

polar operator + (polar o2)
{
    double x=getx()+o2.getx();
    double y=gety()+o2.gety();
    double r=sqrt(x*x + y*y);   //converts x and y to
    double a=atan(y/x);         //Polar co-ordinate.
    return polar(r,a);
}
};

void main()
{
clrscr();
polar o1(10,2),o2(10,5),o3;

o3=o1+o2;

cout<<"\no1 =";
o1.display();
cout<<"\no2 =";
o2.display();
cout<<"\no3 =";
o3.display();

getch();
}

Operator

2011-04-07T22:46:00.001-07:00

#include <iostream.h>
#include <conio.h>

class distance
{
   int feet;
   float inches;
   public:

    distance()          //constructor1
    {feet=0;inches=0;}
    distance(int ft,float inch)       //constructor2
    {feet=ft;inches=inch;}

    void getdata()
    {   cout<<"Enter Feet and inches respectively: ";
    cin>>feet>>inches;
    }

    void display()
    { cout<<"Feet : "<<feet<<endl<<"Inches :"<<inches;}

To Enter Few Records and to sort according to the choice of the data member. (USING NESTED STRUCTURE)

2011-04-07T22:45:00.000-07:00

#include <iostream.h>
#include <iomanip.h>
#include <conio.h>

//GLOBAL DECLARATION OF STRUCTURE
struct date
{
int year,month,day;
};

struct person
{
int recno;
char name[20];
date dob;          //using date structure as datatype
int salary;
};

void line(void);    //Global Declaration of function as it is called in another function other than main.

void main()
{
void starting(void);
void sorting(struct person[],int);
void display(struct person[]);
void end(void);
person rec[5];            //Declaration of person datatype

starting();

textcolor(111);
textbackground(196);
clrscr();
cout<<"\n\n"<<setw(48)<<"RECORD INFORMATION";
//for inserting records
cout<<"\n\n\n\n\tEnter 5 Records\n\n\n\n";
for(int i=0,c=1;i<5;i++)
{

    cout<<"Information for Record No. "<<c<<endl;
       c++;
    line();
    cout<<"\n\nEnter Record Number:-";
   cin>>rec[i].recno;
    cout<<"Enter Name :-";
   cin>>rec[i].name;
   cout<<"\nFOR Birth_Date\n";
   cout<<"--------------\n";
   cout<<"Enter Year:-";
   cin>>rec[i].dob.year;
   cout<<"Enter Month:-";
   cin>>rec[i].dob.month;
   cout<<"Enter Day:-";
   cin>>rec[i].dob.day;
   cout<<"\nEnter salary:-";
   cin>>rec[i].salary;
   line();
   cout<<endl<<endl;
}

clrscr();
display(rec);
clrscr();
cout<<endl<<endl;
int choice;
do
{
cout<<endl<<endl;
cout<<"\n\nWhat Operation Would you Like to Perform\n";
cout<<"1)    sort by Record Number\n";
cout<<"2)    sort by Name\n";
cout<<"3)    sort by Date\n";
cout<<"4)    sort by Salary\n";
cout<<"5)    DISPLAYING\n";
cout<<"6)    QUIT\n";
cout<<"Enter Your Choice:-";
cin>>choice;
    switch(choice)
    {
    case     1:
    case     2:
    case     3:
   case    4:sorting(rec,choice);
                 break;
    case     5:display(rec);
               break;
   case    6:goto out;
    default:cout<<"Entered Choice is Invalid, Try Again";
    }
   getch();
   clrscr();
}while(1);
out:
}

//sorting function
void sorting(struct person rec[],int choice)
{
struct person tempq;

         //record Number wise Sorting
      if(choice==1)
      {
          for(int i=0;i<5;i++)
         {
             for(int j=i+1;j<5;j++)
            {
                if(rec[i].recno > rec[j].recno)
               {
                tempq        =    rec[i];
               rec[i]    =    rec[j];
               rec[j]    =    tempq;
               }
            }
         }
      }

   //namewise sorting

    if(choice==2)
   {
       for(int i=0;i<5;i++)
      {
          for(int j=i+1;j<5;j++)
         {
             if(strcmp(rec[i].name,rec[j].name)>0)
                {
               tempq                = rec[i];
               rec[i]             = rec[j];
               rec[j]            = tempq;
               }
         }
      }
    }

    //datewise
   if(choice==3)
   {
    for(int i=0;i<5;i++)
   {
       for(int j=i+1;j<5;j++)
      {
            if(rec[i].dob.year > rec[j].dob.year)
             {
                tempq                = rec[i];
               rec[i]             = rec[j];
               rec[j]            = tempq;

               if(rec[i].dob.month > rec[j].dob.month)
                   {
                  tempq                =   rec[i];
                  rec[i]            =    rec[j];
                  rec[j]            =   tempq;

                      if(rec[i].dob.day > rec[j].dob.day)
                      {
                      tempq                    =    rec[i];
                      rec[i]                = rec[j];
                      rec[j]                = tempq;
                      }

                  }
               }
         }
      }
     }

     //for salary wise

     if(choice==4)
     {
        for(int i=0;i<5;i++)
       {
           for(int j=i+1;j<5;j++)
          {
          if(rec[i].salary > rec[j].salary)
         {
                 tempq            =   rec[i];
                rec[i]           =    rec[j];
                rec[j]        =   tempq;
         }
      }
   }
}

}

//display function
void display(struct person rec[])
{
textcolor(106);
textbackground(104);
clrscr();
cout<<endl<<endl<<endl;
line();
cout<<setw(10)<<"Record No."<<setw(25)<<"NAME OF PERON"<<setw(20)<<"DATE OF BIRTH"<<setw(23)<<"SALARY AT PRESENT"<<endl;
line();
for(int i=0;i<5;i++)
{
cout<<endl;
cout<<setw(6)<<rec[i].recno;
cout<<setw(27)<<rec[i].name;
cout<<setw(15)<<rec[i].dob.day<<"\\"<<rec[i].dob.month<<"\\"<<rec[i].dob.year;
cout<<setw(15)<<rec[i].salary;
cout<<endl;
}
getch();
}

//Line function
void line(void)
{
    for(int i=0;i<40;i++)
    {
        cout<<"--";
    }
   cout<<endl;
}

//Starting function
void starting(void)
{
//START OF programer details\\
textcolor(105);
textbackground(104);
clrscr();
cout<<endl;
cout<<"|";
for(int i=0;i<39;i++)
{
        cout<<"--";
}
cout<<"|";

cout<<" ";
for(int i=0;i<34;i++)
    cout<<"=";

cout<<"R GABA";

for(int i=0;i<33;i++)
    cout<<"=";

cout<<endl;

cout<<"|";
for(int i=0;i<39;i++)
{
        cout<<"--";
}
cout<<"|";
cout<<endl<<endl<<endl;
line();
cout<<setw(49)<<"WELLCOME VIEWERS\n";
line();
cout<<setw(55)<<"SAMPLE DATABASE APPLICATION\n\n";
line();
line();
cout<<setw(79)<<"Created By R GABA\n\n";
line();
line();
cout<<setw(55)<<"EMAIL US ";
getch();
}

MAKING FILE PROGRAM WITH USING ALL MODES

2011-04-07T22:43:00.003-07:00

#include <iostream.h>
#include <fstream.h>
#include <conio.h>

static int totrec=0;    //totrec variable keep track for total variable entered
            //Initially Record scanned are Zero

void main()
{
int choice;
while(1)
{
clrscr();
cout<<"Choose your choice\nNOTE : one choice for one record(except viewing data)\n";
cout<<"1) Scanning intial records\n";
cout<<"2) Appending records\n";
cout<<"3) Modifying or append records\n";
cout<<"4) Viewing records\n";
cout<<"5) Exit\n";
cout<<"Enter your choice : ";
cin>>choice;
switch (choice)
{
case 1 :   {
         ofstream outfile;
         outfile.open("emp",ios::out);
         cout<<"\n\nPlease enter the details as per demanded\n";
         cout<<"\nEnter the name : ";
         char name[20];
         cin>>name;
         outfile<<name<<endl;
         cout<<"Enter Age : ";
         int age;
         cin>>age;
         outfile<<age<<endl;
         cout<<"Enter programming language known by him\her : ";
         char lang[25];
         cin>>lang;
         outfile<<lang<<endl;
         totrec= totrec + 1;
         outfile.close();
         }
         break;
case 2 :   {
         ofstream outfile;
         outfile.open("emp",ios::app);
         cout<<"\n\nPlease enter the details as per demanded\n";
         cout<<"\nEnter the name : ";
         char name[20];
         cin>>name;
         outfile<<name<<endl;
         cout<<"Enter Age : ";
         int age;
         cin>>age;
         outfile<<age<<endl;
         cout<<"Enter programming language known by him : ";
         char lang[25];
         cin>>lang;
         outfile<<lang<<endl;
         totrec = totrec + 1;
         outfile.close();
         }
         break;
case 3 :   {
         ofstream outfile;
         outfile.open("emp",ios::ate);
         cout<<"Are you interested in adding record\nenter y or n\n";
         char ans;
         cin>>ans;
         if(ans=='y' || ans=='Y')
         {
         cout<<"\n\nPlease enter the details as per demanded\n";
         cout<<"\nEnter the name : ";
         char name[20];
         cin>>name;
         outfile<<name<<endl;
         cout<<"Enter Age : ";
         int age;
         cin>>age;
         outfile<<age<<endl;
         cout<<"Enter programming language known by him : ";
         char lang[25];
         cin>>lang;
         outfile<<lang<<endl;
         totrec = totrec + 1;
         }
         outfile.close();
         }
         break;
case 4 :   {
         ifstream infile;
         infile.open("emp",ios::in);
         const int size=80;
         char line[size];
         int counter=totrec;
         while(counter > 0)
         {
         infile.getline(line,size);
         cout<<"\n\nNAME     : "<<line<<endl;
         infile.getline(line,size);
         cout<<"AGE      : "<<line<<endl;
         infile.getline(line,size);
         cout<<"LANGUAGE : "<<line<<endl;
         counter--;
         }
         infile.close();
         }
         getch();
         break;
case 5 : goto out;
default : cout<<"\nInvalid Choice\nTRY AGAIN\n";
}
}
out:
}

MATRIX ADDITION Pointers implementation through pointers

2011-04-07T22:43:00.001-07:00

#include <iostream.h>
#include <iomanip.h>
#include <conio.h>

class matrix
{
int **p,row,col;
public:
void getdata(void);
friend void matrixadd(matrix &,matrix &);
void display(void);
};

void matrix :: getdata(void)
{
clrscr();
cout<<"Enter Size of Row:-";
cin>>row;
p=new int *[row];
cout<<"Enter size of Coulumn:-";
cin>>col;
cout<<"\nEnter Data for Matrix of size "<<row<<"*"<<col<<endl;
for(int i=0;i<row;i++)
{
   p[i]=new int [col];
}
//scaning value
for(int a=0;a<row;a++)
{
for(int b=0;b<col;b++)
{
     cin>>p[a][b];
}
}
}

void matrix :: display(void)
{
cout<<"\n\n\n\n";
cout<<"Display Function\n\n";
for(int i=0;i<row;i++)
{
   for(int j=0;j<col;j++)
   {
     cout<<setw(5)<<p[i][j];
   }
cout<<endl;
}
}

void matrixadd(matrix &a,matrix &b)
{
int result[10][10];
if(a.row==b.row && a.col==b.col)
{
for(int i=0;i<a.row;i++)
{
    for(int j=0;j<a.col;j++)
    {
         result[i][j]=a.p[i][j]+b.p[i][j];
    }
}
//displaying
for(int x=0;x<a.row;x++)
{
    for(int y=0;y<a.col;y++)
    {
      cout<<setw(5)<<result[x][y];
    }
    cout<<endl;
}
}
else
cout<<"Invalid Matrix Addition Occurs as size differs\n";
}

void main()
{
matrix o1,o2;
o1.getdata();
o2.getdata();
clrscr();
o1.display();
o2.display();
getch();
clrscr();
cout<<"\n\nAfter Adition Has been Performed\n\n";
matrixadd(o1,o2);
getch();
}

Matrix Addition by Overloading + operator

2011-04-07T22:42:00.003-07:00

#include <iostream.h>
#include <conio.h>

class matadd
{
int **a;
int row,col;
public:
   matadd(){}
   matadd(int r,int c);
   void getdata(void);
   void display(void);
   matadd operator + (matadd o2);
};

matadd :: matadd(int r,int c)
{
row=r;
col=c;
a=new int *[row];
   for(int i=0;i<row;i++)
     a[i]=new int[col];
}

void matadd :: getdata(void)
{
   cout<<"\n\nEnter Data for "<<row<<" rows and "<<col
       <<" cols\n\n";
   for(int i=0;i<row;i++)
   {
     for(int j=0;j<col;j++)
        cin>>a[i][j];
   }
}

void matadd :: display(void)
{
cout<<"\n\n\nMatrix Display\n\n";
for(int i=0;i<row;i++)
{
    for(int j=0;j<col;j++)
      cout<<a[i][j]<<" ";
    cout<<endl;
}
}

matadd matadd :: operator + (matadd o2)
{
   matadd temp(row,col);
    for(int i=0;i<row;i++)
     {
     for(int j=0;j<col;j++)
      {
       temp.a[i][j]=a[i][j] + o2.a[i][j];
      }
     }
return temp;
}

void main()
{
clrscr();
matadd o1(3,2),o2(3,2),o3;

o1.getdata();
o2.getdata();

o3=o1+o2;

o3.display();

getch();
}

Logic

2011-04-07T22:42:00.001-07:00

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,num,space,k;
clrscr();
printf("Enter the number:-");
scanf("%d",&num);
k=num;
for(i=num;i>=0;i--)
{

    for(space=k;space>0;space--)
   {
       printf(" ");
   }

   for(j=num -(i-1);j>=1;j--)
   {


       printf("%d ",i);
   }
printf("\n");
k--;
}

getch();
}

Library Database 2

2011-04-07T22:41:00.003-07:00

#include <iostream.h>
#include <string.h>
#include <iomanip.h>
#include <conio.h>

class books
{
char **author,**title,**publisher;
int *price;
static int count;
public:

books(void);   //constructor
void getdata(void);
void display_stock(void);
void search(void);
};

int books :: count=0;

books :: books(void)
{
author=new char*[15];
title=new char*[15];
publisher=new char*[15];
price=new int[15];
     for(int i=0;i<15;i++)
       {
         author[i]=new char;
         title[i]=new char;
         publisher[i]=new char;
       }
}

void books :: getdata(void)
{
cout<<"\n\n\nEnter Book name:-";
cin>>title[count];
cout<<"Enter Author name:-";
cin>>author[count];
cout<<"Enter Publisher of book:-";
cin>>publisher[count];
cout<<"Enter Price of book:-";
cin>>price[count];
count++;
}

void books :: display_stock(void)
{
clrscr();
cout<<"\n\n\n";
cout<<setw(15)<<"Book Name"<<setw(20)<<"Author Name"<<setw(20)<<"Publisher"<<setw(10)<<"Price"<<endl<<endl;
for(int i=0;i<count;i++)
{
cout<<setw(15)<<title[i]<<setw(20)<<author[i]<<setw(20)<<publisher[i]<<setw(10)<<price[i]<<endl;
}
cout<<"\n\nTotal Number of Books are "<<count;
}

void books :: search(void)
{
clrscr();
char name[20],writer[20];
cout<<"\n\n\nEnter Book name:-";
cin>>name;
cout<<"Enter Author of Book:-";
cin>>writer;
for(int i=0;i<count;i++)
{
   if((strcmp(title[i],name)==0) && (strcmp(author[i],writer)==0))
     {
     cout<<"\n\nEntered Information Book Available\n";
     cout<<"Price of that book is "<<price[i];
     goto skip;
     }
}
cout<<"\n\nBook is not Available in stock\n";
skip:
}

void main()
{
clrscr();
books o1;
int choice;
while(1)
{
cout<<"\n\nChoose your choice\n";
cout<<"1) Entering Information for book\n";
cout<<"2) To See Actual stock\n";
cout<<"3) To Search for a Particular book\n";
cout<<"4) Exit\n";
cout<<"Enter your choice:-";
cin>>choice;
switch(choice)
{
   case 1 : o1.getdata();
             break;
   case 2 : o1.display_stock();
             break;
   case 3 : o1.search();
             break;
   case 4 : goto out;
   default: cout<<"\n\nEnter choice is invalid\nTry again\n";
}
}
out:
}

Library Database

2011-04-07T22:41:00.001-07:00

#include <iostream.h>
#include <conio.h>
#include <iomanip.h>

struct library
{
char author[20],title[20],pub[20];
int price;
library *next;
};

int sum=0;

void main()
{
clrscr();
library *head=NULL;
library *initial(void);
library *purchase(library *);
//library *sale(library *);
void display(library *);
void stock(library *);
void search(library *);

int choice;
while(1)
{
cout<<"Choose your Choice\n";
cout<<"1)    Initial Data Entry\n";
cout<<"2)    Purchase of Book\n";
cout<<"3)    Sales of Book\n";
cout<<"4)    Stock of Book\n";
cout<<"5)    Search of Book\n";
cout<<"6)    Display Books\n";
cout<<"7)    Exit\n";
cout<<"Enter Your Choice:-";
cin>>choice;
    switch(choice)
   {
   case 1 : head=initial();
               getch();
               break;
   case 2 : head=purchase(head);
               getch();
               break;
// case 3 : head=sale(head);
//             break;
   case 4 : stock(head);
               getch();
               break;
   case 5 : search(head);
               getch();
               break;
   case 6 : display(head);
               getch();
            break;
   case 7 : goto out;
   default: cout<<"\nInvalid Choice\nTRY AGAIN\n";
   }
clrscr();
}
out:
}

library *initial(void)
{
clrscr();
library *newl=NULL,*start=NULL,*end=newl;
char ch;
    while(1)
   {
   cout<<"\n\nType y or Y for yes\n";
   cout<<"Are you Interested in Entering Entry:-";
   cin>>ch;
   if(ch=='y' || ch=='Y')
   {
         newl=new library;
      cout<<"\n\nEnter Author of Book:-";
      cin>>newl->author;
      cout<<"Enter Title of Book:-";
      cin>>newl->title;
      cout<<"Enter Publication of Book:-";
      cin>>newl->pub;
      cout<<"Enter Price of Book:-";
      cin>>newl->price;
        sum=sum+newl->price;
      if(start==NULL)
          start=newl;
      else
          end->next=newl;
      end=newl;
      end->next=NULL;
   }
   else
       break;
    }
return(start);
}

library *purchase(library *start)
{
clrscr();
int pos,count=1,choice;
library *newl,*cnt=start,*head=start;
if(start==NULL)
    cout<<"\n\nLIST IS EMPTY\n";

cout<<"\n\nChoose your Choice\n";
cout<<"1)    Inserting At FIRST POSITION\n";
cout<<"2)    Inserting In BETWEEN\n";
cout<<"3)    Inserting At LAST POSITION \n";
cout<<"4)    Exit\n";
cout<<"Enter your choice:-";
cin>>choice;

if(choice >=1 && choice <=3)
{
    newl=new library;
   cout<<"Enter Author Name :-";
   cin>>newl->author;
   cout<<"Enter Book Title :-";
   cin>>newl->title;
   cout<<"Enter Publication :-";
   cin>>newl->pub;
   cout<<"Enter Price of Book:-";
   cin>>newl->price;
   sum=sum+newl->price;
}

switch(choice)
{
    case 1 :          //for First position
                       newl->next=head;
                        head=newl;
                        break;

   case 2 :          //for Middle position
                       read:
                       cout<<"\n\nAt which position you want to insert Record:-";
                        cin>>pos;
                        while(cnt!=NULL)
                        {
                        count++;                   //cnt for counting variable of type node
                        cnt=cnt->next;
                        }
                        if(pos<1 || pos>count+1)
                       {
                        cout<<"\n\nEntered position is Invalid\nTRY AGAIN\n";
                        goto read;
                  }

                  {                    //Extra Braces are used as case bypasses intialization of a local variable
                        int c=1;
                        while(c<pos-1)
                        {
                            c++;
                            start=start->next;
                        }
                  }
                        newl->next=start->next;
                        start->next=newl;
                       break;

   case 3 :        //for Last position
                        while(start->next!=NULL)
                            start=start->next;

                       start->next=newl;
                       newl->next=NULL;
                  break;

   case 4 :         goto out;

   default:       cout<<"\nEntered Choice is Invalid Try again\n";
                       break;

}
out:
return(head);
}

void stock(library *start)
{
clrscr();
int count=0;
    while(start!=NULL)
   {
        count++;
      start=start->next;
   }
cout<<"\n\n\n\tTotal Number of Books in Stock is "<<count<<endl;
cout<<"\tPurchase Price of Total Stock is "<<sum;
}

void search(library *start)
{
clrscr();
char author[20],title[20];
cout<<"Enter Book title and its Author name respectively to Search in stock\n";
cin>>title>>author;
    while(start!=NULL)
   {
        if(title==start->title)
      {
          if(author==start->author)
         {
             cout<<"\n\nBook is In Stock\n";
            cout<<"It Cost Rs"<<start->price;
            return;
         }
      }
    }
cout<<"\n\nSEARCH IS NOT IN STOCK\n";
}

void display(library *start)
{
clrscr();
cout<<setw(10)<<"Book Title"<<setw(25)<<"Author of Book"<<setw(25)<<"Publication"<<setw(20)<<"Price"<<endl<<endl;
for(int i=0;i<40;i++)
    cout<<"=*";
cout<<endl;
while(start!=NULL)
{
cout<<setw(10)<<start->title<<setw(25)<<start->author<<setw(25)<<start->pub<<setw(20)<<start->price<<endl;
start=start->next;
}
}

Unary Operator ++

2011-04-07T22:40:00.001-07:00

#include <iostream.h>
#include <conio.h>

class counter
{
int count;
public:
counter(){count=0;}
counter(int a)
{count=a;}
void operator ++()                   //for prefix
{count++;}
counter operator ++(int)             //for eg:- c1 = c2++
{                                             //and postfix expression
     count++;
     counter temp;
     temp.count=count;
     return temp;
}
void getdata(void)
{
    cout<<"\n\nEnter Value for Count :-";
    cin>>count;
}
void display(void)
{
    cout<<"\nValue of count is "<<count<<endl;
}
};

void main()
{
clrscr();
counter o1(9),o2,o3;
o1++;
o1.display();

o2.getdata();
o2++;
++o2;
o2.display();

o3=o2++;
o3.display();
getch();
}

Conversion from CLASS TO CLASS

2011-04-07T22:39:00.003-07:00

#include <iostream.h>
#include <conio.h>

class invent1
{
int code;
int items;
float price;

public:

invent1()
{}

invent1(int a,int b,int c)
{
    code=a;
    items=b;
    price=c;
}

void display()
{
    cout<<"\nCode : "<<code;
    cout<<"\nItems : "<<items;
    cout<<"\nPrice : "<<price;
}

int getcode()
{return code;}

int getitem()
{return items;}

int getprice()
{return price;}

};

class invent2
{
int code;
float value;

   public:

    invent2()
    {
      code=0;
      value=0;
    }

    invent2(int x,float y)
    {
      code=x;
      value=y;
    }

    void display()
    {
     cout<<"Code : "<<code<<endl;
     cout<<"Value : "<<value<<endl;
    }

    invent2(invent1 p)
    {
     code=p.getcode();
     value=p.getitem()*p.getprice();
    }
};

void main()
{
clrscr();
invent1 s1(100,5,140);
invent2 d1;

d1=s1; //Invoke Constructor in Invent2 for conversion

cout<<"\nProduct details - Invent1 type";
s1.display();

cout<<"\n\n\nProduct details - Invent2 type\n";
d1.display();
getch();
}

File in c++

2011-04-07T22:39:00.001-07:00

#include<iostream.h>
#include<fstream.h>
#include<conio.h>
#include<process.h>
#include<string.h>

void main()
{
    fstream fin,fout;
    char ch;
    int flag = 1;
    clrscr();
    fin.open("data.txt",ios :: out | ios :: in);
    fout.open("data1.txt",ios :: out | ios :: in);
    fin.seekg(0);
    if(fin==NULL)
       cout<<"Unable to open file";
    while(fin)
    {
        fin.get(ch);
        if(ch == ' ')
        {
            flag = 0;
        }
        else
        {
            if(flag == 0)
            {
                fout.put(' ');
                cout<< ' ';
                flag = 1;
            }
            fout.put(ch);
            cout<<ch;
        }
    }
}

Inventory and Stock

2011-04-07T22:38:00.001-07:00

#include <iostream.h>
#include <iomanip.h>
#include <conio.h>
#define MAX_REC 10

class Inventory{
    char itemName[15];
    int code;
    double cost;
    public:
    void getdata();
    void showdata();
};

void Inventory :: getdata(){
    cout<<"\nEnter Item Name : ";
    cin>>itemName;
    cout<<"Enter Code : ";
    cin>>code;
    cout<<"Enter Cost : ";
    cin>>cost;
}

void Inventory :: showdata(){
    cout<<endl;
    cout.width(15);
    cout.setf(ios::left, ios::adjustfield);
    cout<<itemName;

    cout.width(8);
    cout<<code;

    cout.width(15);
    cout.setf(ios::right, ios::adjustfield);
    cout.setf(ios::showpoint);
    cout.setf(ios::fixed,ios::floatfield);
    cout.precision(2);
    cout<<cost;
}

void main(){
    Inventory record[MAX_REC];
    int i,n;
    clrscr();

    cout<<"\n=====Inventory Management=====\n";
    cout<<"\nHow many Records to be created : ";
    cin>>n;

    cout<<"Enter "<<n<<" Records\n";
    for(i=0;i<n;i++)
        record[i].getdata();

    cout<<"\n\n---Stock Information---\n";
    cout<<"\n"<<setw(8)<<"Item Name"
        <<setw(10)<<"Code"
        <<setw(19)<<"Cost"<<endl;
    cout<<"-------------------------------------------";

    for(i=0;i<n;i++)
        record[i].showdata();

    getch();
}

Binary Operator + to add two object

2011-04-07T22:37:00.001-07:00

#include <iostream.h>
#include <conio.h>

class distance
{
int feet;
float inches;
public:
   distance()
   { feet=0;inches=0.0;}
   distance(int ft,float in)
   { feet=ft; inches=in;}
   void getdist()
   {
     cout<<"\nEnter feet   : ";
     cin>>feet;
     cout<<"\nEnter Inches : ";
     cin>>inches;
   }
   void showdist()
   {
     cout<<feet<<"\'-"<<inches<<'\"';
   }

   distance operator + (distance);
};

distance distance :: operator + (distance d2)
{
   int   f = feet + d2.feet;
   float i = inches + d2.inches;
   if(i >= 12.0)
     {
       i = i - 12.0;
       f++;
     }
   return distance(f,i);
}

Conversion BASIC TO CLASS TIME CONVERSION

2011-04-07T22:36:00.003-07:00

#include <iostream.h>
#include <conio.h>

class time
{
int hrs;
int mins;
public:
    time()
    {}
    time(int t)
    {
      hrs=t/60;
      mins=t%60;
    }
    void display()
    {
     cout<<"\nHours   = "<<hrs;
     cout<<"\nMinutes = "<<mins;
    }
};

void main()
{
clrscr();
time o1;
int duration;
cout<<"Enter Duration : ";
cin>>duration;

o1=duration;        //Invoke the constructor

o1.display();
getch();
}

Conversion BASIC TO CLASS TYPE string to class object

2011-04-07T22:36:00.001-07:00

#include <iostream.h>
#include <conio.h>
#include <string.h>

class string
{
char *p;
int len;
public:
    string::string()
    {}
    string::string(char *a)
    {
      len=strlen(a);
      p=new char[len+1];
      strcpy(p,a);
    }
    void display()
    {
      cout<<p;
    }
};

void main()
{
clrscr();
string s1,s2;
char *name1="vivek";
char *name2="patel";
s1=string(name1);       //Invoke constructor
s2=name2;               //Invoke constructor

s1.display();
cout<<endl;
s2.display();
getch();
}

write a class to represent a vector (a series of float values). Include member functions to perform the following tasks:

2011-04-07T22:35:00.001-07:00

1)To Create the Vector
2)To modify the value of a given element
3)To multiply by a scalar value.
4)To display the vector in the form (10,20,30....)
Write a program to test your class*/

#include <iostream.h>
#include <conio.h>

int const size=50;

class vector
{
float d[size];
int s;
public:
void create(void);
void modify(void);
void multiply(void);
void display(void);
};

void vector :: create(void)
{
cout<<"\n\nEnter of Array you want to create:-";
cin>>s;
cout<<"Enter "<<s<<" Real Numbers\n";
for(int i=0;i<s;i++)
       cin>>d[i];
}

void vector :: modify(void)
{
int mfy_value;
float with;
cout<<"\nEnter Location of array at which value is to be modified:-";
cin>>mfy_value;
cout<<"Enter Value with which you want to Replace:-";
cin>>with;
d[mfy_value]=with;
}

void vector :: multiply(void)
{
int mul;
cout<<"\nEnter value with which you want to multiply:-";
cin>>mul;
for(int i=0;i<s;i++)
    d[i]=d[i]*mul;
}

void vector :: display(void)
{
cout<<"\n\nDisplay of Array\n";
cout<<"(";
for(int i=0;i<s;i++)
{
    cout<<d[i];
if(i!=s-1)
     cout<<",";
}
cout<<")";
}

void main()
{
clrscr();
vector o1;
int choice;
do
{
cout<<"\n\nChoice List\n";
cout<<"1)    To Create Vector Array\n";
cout<<"2)    To Modify Array\n";
cout<<"3)    To Multiply with Scalar value\n";
cout<<"4)    To Display\n";
cout<<"5)    EXIT\n";
cout<<"Enter your choice:-";
cin>>choice;
switch(choice)
{
case 1:    o1.create();
    break;
case 2:    o1.modify();
    break;
case 3: o1.multiply();
    break;
case 4: o1.display();
    break;
case 5:goto end;
}
}while(1);
end:
}