c++ programs for the students of NATIONAL INSTITUTE OF OPEN SCHOOLING

Using class in c++

2008-05-05T02:45:00.000-07:00

Define a class worker with the following specifications :

Private members of class worker

wno                  integer

wname             25 characters

hrwk, wgrate    float (hour worked and wage rate per hour)

totwage            float (hrwk * wgrate )

calcwg ( )         A function to find hrwk * wgrate with float return type.

Public members of class worker

In_data ( ) a function to accept values for wno, wname, hrwk, wgrate and invoke calcwg ( ) to calculate netpay.

Out_data ( ) a function to display all the data members on the screen

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <stdio.h>

class worker {

private:

int wno;

char name[25];

char subject[10];

float hrwk;

float wgrate;

float totwage;

float calcwg();

public:

void In_data();

void Out_data();

};

float worker::calcwg() {

return hrwk*wgrate;

}

void worker::In_data() {

cout<<"\nEnter worker number: ";

cin>>wno;

cout<<"\nEnter your name: ";

gets(name);

cout<<"\nEnter hour worked: ";

cin>>hrwk;

cout<<"\nEnter wage per hour : ";

cin>>wgrate;

totwage=calcwg();

}

void worker::Out_data() {

cout<<"\nYour worker number: "<<wno;

cout<<"\nYour name: "<<name;

cout<<"\nhours worked: "<<hrwk;

cout<<"\nWage per hour: "<<wgrate;

cout<<"\nYour total wages: "<<calcwg();

}

void main() {

worker w1;

w1.In_data();

w1.Out_data();

getch();

}

Using class in c++

2008-05-05T02:44:00.000-07:00

Define a class Teacher with the following specifications :

Private members :

Name                          20 characters

Subject                       10 characters

Basic, DA, HRA           float

Salary float

Calculate ( )               function computes the salary and returns it.

Public members :

Readdata ( )               function accepts the data values and invokes the calculate function.

Displaydata ( )            function prints the data on the screen.

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <stdio.h>

class student {

private:

char name[20];

char subject[10];

float basic;

float da;

float hra;

float salary;

float calculate();

public:

void readdata();

void displaydata();

};

float student::calculate() {

return basic+da+hra;

}

void student::readdata() {

cout<<"\nEnter your name: ";

gets(name);

cout<<"\nEnter your basic salary: ";

cin>>basic;

cout<<"\nEnter your daily allowance: ";

cin>>da;

cout<<"\nEnter your Hourse Rent Allowance: ";

cin>>hra;

salary=calculate();

}

void student::displaydata() {

cout<<"\nYour name: "<<name;

cout<<"\nYour total salary: "<<calculate();

}

void main() {

clrscr();

student s1;

s1.readdata();

s1.displaydata();

getch();

}

using nested structure in c++

2008-05-05T02:42:00.002-07:00

Write a C++ nested structure for the record given below. Use appropriate data type.

Name, Roll No., Date of Birth (Day, Month, Year)

Assign value to all the members of the structure.

PROGRAM

#include <iostream.h>

#include <conio.h>

#include <stdio.h>

struct date{

int day;

int month;

int year;

};

struct student {

char name[50];

int rollno;

date dob;

};

void main()

{

clrscr();

student s1;

cout<<"\nEnter your name: ";

gets(s1.name);

cout<<"\nEnter your roll No: ";

cin>>s1.rollno;

cout<<"\nEnter birth date: ";

cin>>s1.dob.day;

cout<<"\nEnter birth month: ";

cin>>s1.dob.month;

cout<<"\nEnter birth year: ";

cin>>s1.dob.year;

cout<<"\nYour Name is "<<s1.name;

cout<<"\nYour Roll No is "<<s1.rollno;

cout<<"\nYour Date of Birth is "<<s1.dob.day<<"-"<<s1.dob.month<<"-"<<s1.dob.year;

getch();

}

program to sort an array in c++ using selection sort

2008-05-05T02:42:00.001-07:00

Write a program that will sort the given ten numbers in descending order using:

PROGRAM:

#include <iostream.h>

#include <conio.h>

const int N=10;

void main() {

int a[N],temp,i,j,first;

clrscr();

cout<<"Enter values to be sorted:\n";

for(i=0;i<N;i++) {

cout<<"Enter Value "<<i+1<<" : ";

cin>>a[i];

}

for(i=0;i<N-1;i++) {

first=i;

for(j=i+1;j<N;j++){

if(a[first]>a[j]) {

first=j;

}

}

temp=a[i];

a[i]=a[first];

a[first]=temp;

}

cout<<"\nThe sorted array is: \n";

for(i=0;i<N;i++) {

cout<<"\t"<<a[i];

}

getch();

}

sorting an array in c++ using bubble sort

2008-05-05T02:40:00.000-07:00

Write a program that will sort the given ten numbers in descending order using: Bubble sort

PROGRAM:

#include <iostream.h>

#include <conio.h>

const int N=10;

void main() {

int a[N],temp,i,j;

clrscr();

cout<<"Enter ten values to be sorted:\n";

for(i=0;i<N;i++) {

cout<<"Enter Value "<<i+1<<" : ";

cin>>a[i];

}

for(i=0;i<N-1;i++)

for(j=0;j<N-1;j++)

if(a[j]>a[j+1]) {

temp=a[j];

a[j]=a[j+1];

a[j+1]=temp;

}

cout<<"\nThe sorted array is: \n";

for(i=0;i<N;i++) {

cout<<"\t"<<a[i];

}

getch();

}

searching array using binary search in c++

2008-05-05T02:39:00.001-07:00

Write a program that will find out whether the data entered by the user present in a one dimensional array of 10 elements using: Binary Search

PROGRAM

#include <iostream.h>

#include <conio.h>

void main() {

int a[10],data,i,initial,final,mid;

initial=0; final=9;

mid=(initial+final)/2;

clrscr();

cout<<"Enter ten values IN ascending order:\n";

for(i=0;i<10;i++) {

cout<<"Enter Value "<<i+1<<" : ";

cin>>a[i];

}

cout<<"\nEnter data to be searched: ";

cin>>data;

while((initial<=final) && (a[mid]!=data)) {

if(a[mid]>data)

final=mid-1;

else

initial=mid+1;

mid=(initial+final)/2;

}

if(a[mid]==data)

cout<<"\ndata is present";

if(initial>final)

cout<<"\ndata not present in the list";

getch();

}

searching array using linear search in c++

2008-05-05T02:38:00.003-07:00

Write a program that will find out whether the data entered by the user present in a one dimensional array of 10 elements using: Linear search

Using Linear search

PROGRAM:

#include <iostream.h>

#include <conio.h>

void main() {

int a[10],data,i,flag=0;

clrscr();

cout<<"Enter ten values:\n";

for(i=0;i<10;i++) {

cout<<"Enter Value "<<i+1<<" : ";

cin>>a[i];

}

cout<<"\nEnter data to be searched: ";

cin>>data;

for(i=0;i<10;i++) {

if(a[i]==data){

flag=1;

break;

}

}

if(flag==1)

cout<<"\ndata present";

else

cout<<"\ndata not present";

getch();

}//end of main

Using two diamensional array to find sum of diagonal in c++

2008-05-05T02:36:00.000-07:00

Write a program that will find out the sum of diagonal of two dimensional array of A [N] [N].

PROGRAM:

#include <iostream.h>

#include <conio.h>

void main() {

int a[10][10];

int r,c,i,j,sum=0;

do {

clrscr();

cout<<"\nEnter the number of rows for the matrix: ";

cin>>r;

cout<<"\nEnter the number of cols for the matrix: ";

cin>>c;

} while(c!=r);

cout<<"\nEnter values for matrix a: \n";

for(i=0;i<r;i++) {

for(j=0;j<c;j++) {

cout<<"a["<<i<<"] ["<<j<<"] : ";

cin>>a[i][j];

if(i==j) {

sum+=a[i][j];

}

}

}

cout<<"sum of the diagonal of two dimensional array: "<<sum;

getch();

}

program to find numbers greater, less or equal to zero using an array in C++

2008-05-05T02:35:00.000-07:00

Write a program that will read 20 float values in a one dimensional array and find out the following:

a. Number of values greater than zero.

b.Number of values equal to zero.

c. Number of values less than zero.

PROGRAM:

#include <iostream.h>

#include <conio.h>

void main() {

clrscr();

float a[20];

int gz=0,lz=0,z=0;

for(int i=0;i<20;i++) {

cout<<"\nenter value "<<i<<" : ";

cin>>a[i];

if(a[i]>0)

gz++;

else if(a[i]<0)

lz++;

else

z++;

}

cout<<"\nTotal numbers greater than zero: "<<gz;

cout<<"\nTotal numbers less than zero: "<<lz;

cout<<"\nTotal numbers that are zero: "<<z;

getch();

}

program to find the largest number using user defined function

2008-05-05T02:33:00.000-07:00

Write a program in C++ that prints the largest of two number entered from the keyboard. Pass the two numbers to a function as argument, find the largest and return this value to a main function.

PROGRAM:

#include <iostream.h>

#include <conio.h>

int largest(int,int);

void main() {

clrscr();

int a,b;

cout<<"PROGRAM TO FIND LARGEST NUMBER\n";

cout<<"Enter first value : ";

cin>>a;

cout<<"Enter second value: ";

cin>>b;

cout<<largest(a,b)<<" is largest";

getch();

}

int largest(int a,int b) {

if(a>b)

return a;

else

return b;

}

program to compute cube, Using inline function in c++

2008-05-05T02:32:00.000-07:00

Write a program in C++ to call a function which will return the cube of a given number using inline function.

PROGRAM:

#include <iostream.h>

#include <conio.h>

inline int cube(int r) {

return r*r*r;

}

void main() {

clrscr();

int r;

cout<<"PROGRAM TO COMPUTE CUBE\n";

cout<<"Enter value to compute cube: ";

cin>>r;

cout<<"cube of the number: "<<cube(r);

getch();

}

program to count vowel alphabets using c++

2008-05-05T02:30:00.000-07:00

Write a program that will count the number of A's, E's, I's, O's and U's in a sentence.

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <ctype.h>

void main() {

clrscr();

int a=0,e=0,i=0,o=0,u=0;

char ch;

cout<<"Program to count number of a,e,i,o,u in a sentence \n";

cout<<"Enter your sentence: \n";

while((ch=getche())!='\r') {

switch(tolower(ch)) {

case 'a': a++;

break;

case 'e': e++;

break;

case 'i': i++;

break;

case 'o': o++;

break;

case 'u': u++;

break;

}//end of switch

}//end of while

cout<<"\nTotal Number of a: "<<a;

cout<<"\nTotal Number of e: "<<e;

cout<<"\nTotal Number of i: "<<i;

cout<<"\nTotal Number of o: "<<o;

cout<<"\nTotal Number of u: "<<u;

getch();

}//end of program

program to count number of words in c++

2008-05-05T02:29:00.000-07:00

Write a program that will count the number of words in a sentence entered by the user.

PROGRAM:

#include <iostream.h>

#include <conio.h>

void main() {

clrscr();

int wrdcnt=1;

char ch;

cout<<"Program to count number of WORDS entered by the user: \n";

cout<<"Enter your sentence: \n";

while((ch=getche())!='\r')

{

if(ch==' ')

wrdcnt++;

}

cout<<"\ntotal words in above sentence: "<<wrdcnt;

getch();

}

program to count number of characters

2008-05-05T02:27:00.000-07:00

Write a program that will count the number of characters in a sentence entered by user.

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <stdio.h>

#include <string.h>

void main() {

clrscr();

int len;

char ch[200];

cout<<"Program to count number of characters entered by the user: \n";

cout<<"Enter your sentence: \n";

gets(ch);

len=strlen(ch);

cout<<"\ntotal number of characters: "<<len;

getch();

}

program to check alphabet or digit, uppercase or lowercase

2008-05-05T02:26:00.000-07:00

Write a program that will ask the user to enter a character. Check if it is alphabetic or not. If alphabetic, check whether it is in uppercase or lowercase.

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <stdio.h>

#include <ctype.h>

void main() {

clrscr();

char ch;

cout<<"Enter a characher: ";

ch=getchar();

if(isalpha(ch)) {

cout<<ch<<" is an alphabet\n";

if(islower(ch))

cout<<ch<<" is in lowercase\n";

else

cout<<ch<<" is in uppercase\n";

}else

cout<<ch<<" is not an alphabet\n";

getch();

}//end of the program

program to convert uppercase to lowercase and vice versa

2008-05-05T02:24:00.002-07:00

Write a program that will ask the user to enter his/her name. Convert all uppercase letter to lowercase letter and vice-versa.

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <stdio.h>

#include <ctype.h>

#include <string.h>

void main() {

clrscr();

int len,chr;

char ch[50];

cout<<"Program to conver lowercase to uppercase and uppercase to lowercase:\n";

cout<<"Enter Your Name: ";

gets(ch);

len=strlen(ch);

for(int i=0;i<len;i++) {

chr = ch[i];

if(isupper(chr))

chr = tolower(chr);

else

chr = toupper(chr);

putchar(chr);

}

getch();

}//end of the program

program to find alphabet, digit or symbol

2008-05-05T02:24:00.001-07:00

Write a program that will ask the user to enter a single character. Find out whether it is alphabetic, digit or special character.

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <stdio.h>

#include <ctype.h>

void main() {

clrscr();

char ch;

cout<<"Enter either digit, alphabet or special symbol: ";

ch=getchar();

if(isalpha(ch)) {

cout<<"You entered alphabet\n";

}

else if(isdigit(ch)) {

cout<<"You entered digit\n";

}

else

cout<<"You entered special symbol";

getch();

}//end of the program

program to find positive, negative and zero integers

2008-05-05T02:22:00.000-07:00

Write a program that will ask the user to enter N integers. Find out the following:

(i) Total number of positive integers

(ii) Total number of negative integers

(iii) Total number of integers equal zero

PROGRAM:

#include <iostream.h>

#include <conio.h>

void main() {

clrscr();

int terms,num,pi=0,ni=0,z=0;

cout<<"how many integers do you want to enter: ";

cin>>terms;

for(int i=1;i<=terms;i++) {

cout<<"enter num "<<i<<" : ";

cin>>num;

if(num==0)

z++;

else if(num>0)

pi++;

else

ni++;

}

cout<<"\nTotal Positive Integers: "<<pi;

cout<<"\nTotal Negative Integers: "<<ni;

cout<<"\nTotal Integers which are zero: "<<z;

getch();

}//end of the program

program to find even or odd number, prime number or not

2008-05-05T02:20:00.000-07:00

Write a program that will find out whether the given number is even or odd. If odd number then whether it is prime or not.

PROGRAM:

#include <iostream.h>

#include <conio.h>

void main() {

clrscr();

int num,flag=0;

cout<<"Enter the number to find odd or even: ";

cin>>num;

if((num%2)==0) {

cout<<num<<" is even\n";

}//end of if

else {

cout<<num<<" is odd\n";

for(int i=3;i<=7;i+=2) {

if(num%i==0){

flag=1;

break;

}

}//end of for

if(flag==1)

cout<<num<<" is not a prime number\n";

else

cout<<num<<" is a prime number\n";

}//end of else

getch();

}//end of the program

program to find factorial in C++ upto a given term

2008-05-05T02:19:00.000-07:00

Write a program that will take a number N as input and print the factorial of all numbers from 1 to N

PROGRAM:

#include <iostream.h>

#include <conio.h>

void main() {

clrscr();

long int fact;

int num, temp;

cout<<"Enter the number upto which you wan to generate factorial: ";

cin>>num;

cout<<”Program Factorial: “;

for(int i=1;i<=num;i++) {

temp=i;

fact=1;

while(temp>0) {

fact*=temp;

temp--;

}

cout<<"\n"<<i<<" ! = "<<fact;

}//end of for loop

getch();

}//end of the program

program to find sum of the series in c++

2008-05-05T02:18:00.000-07:00

Write a program to find out the sum of the series

1 + x + x2 + x2 ................ xn

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <math.h>

void main() {

clrscr();

int term,num;

long int sum=1;

cout<<"Enter the number to take the series of: ";

cin>>num;

cout<<"Enter the term for which the series is to be taken: ";

cin>>term;

for(int i=2;i<=term;i++) {

sum+=pow(num,i);

}

cout<<"The sum of the series: "<<sum;

getch();

}//end of the program

quadratic equation in c++

2008-05-05T02:17:00.000-07:00

Determine the roots of the quadratic equation

ax2 + bx + c = 0

using the formula of quadratic equation

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <math.h>

#include <stdlib.h>

void main() {

clrscr();

double a,b,c,d;

cout<<"Enter the values of A, B and C for the given quadratic equation";

cout<<"\nEnter value A: ";

cin>>a;

cout<<"\nEnter value B: ";

cin>>b;

cout<<"\nEnter value C: ";

cin>>c;

if(sqrt(pow(b,2)-(4*a*c)<0)) {

cout<<"\ndeterminant is less than 0, \nroots of the quadratic equation cannot be found";

getch();

exit(0);

}

d=sqrt(pow(b,2)-(4*a*c));

cout<<"\nThe roots of the quadratic equation are: \n";

cout<<"\nRoot 1: "<<-b+d/(2*a);

cout<<"\nRoot 2: "<<-b-d/(2*a);

getch();

}//end of the program

pythagorean triplets in c++

2008-05-05T02:16:00.000-07:00

Write a program that will find pythagorean triplets between 1 to 100.

(Pythagorean triplets are such that the square of one number is equal to the

sum of the squares of the other two numbers).

Example : 3, 4, 5

52 = 32 + 42

25 = 9 + 16 = 25

PROGRAM:

#include <iostream.h>

#include <conio.h>

#include <math.h>

void main() {

clrscr();

cout<<"pythagorean triplets between 1 to 100 are:\n";

for(int i=1;i<=100;i++) {

for(int j=i+1;j<=100;j++) {

for(int k=j+1;k<=100;k++) {

if(pow(i,2) + pow(j,2) == pow(k,2))

cout<<i<<" "<<j<<" "<<k<<"\n";

}

}

}

getch();

} //end of the program

printing table in c++

2008-05-05T02:15:00.000-07:00

Write a program to print all the tables between 2 and 20 upto 10.

PROGRAM:

#include <iostream.h>

#include <conio.h>

void main() {

clrscr();

for(int j=2;j<=20;j++) {

for(int i=1;i<=10;i++) {

cout<<j<<" X "<<i<<" = "<<j*i<<"\n";

}

cout<<"\n";

}

getch();

}//end of the program

factorial in C++

2008-05-05T02:14:00.000-07:00

Write a program that will print the factorial of any number.

input : 5

Output : 5 x 4 x 3 x 2 x 1 = 120

PROGRAM:

#include <iostream.h>

#include <conio.h>

void main() {

clrscr();

long int fact=1;

int num;

cout<<"Enter the number to generate factorial: ";

cin>>num;

while(num>0) {

fact*=num;

num--;

}

cout<<"The factorial is "<<fact;

getch();

}//end of the program