C Language Codes

Create Graphical Loading Bar in C

2012-01-10T02:20:00.000-08:00

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<dos.h>

void main(void)
{
int driver=DETECT, mode;

int i;

initgraph(&driver,&mode,"c:\\tc\\bgi"); //initialize graphics mode
textcolor(BLACK); //background color

  moveto(200,180); //loading process
outtext("Loading, please wait...");
for(i=0;i<600;i+=15)
{
  setcolor(3); //loading bar color
  line(20,380,i+39,380);
  delay(150); //slow down loop speed
}
setcolor(WHITE);
moveto(210,200);
outtext("Loading Completed!"); //loading process complete
delay(1000);
closegraph(); //close graphics mode

}

If you have any problem with the above code, you can contact me...

What are Pointers?

2011-12-21T02:42:00.000-08:00

A pointer provides a way of accessing a variable without referring to the variable directly.

The mechanism used for this is the address of variable. The address act as an intermediate between the variable and the program accessing it.

Let's have a look at the following example:

#include<stdio.h>

#include<conio.h>

void main()

{

int *p, q; //pointer variable always initialize with an *

q = 100; //assigning value to q

p = &q; //inserting the address of q into p

printf("%d",*p); //see the description below

getch(); //exit on key press

}

In the above program, the value of q (i.e. 100) is shown through the pointer variable p (i.e. *p). You can easily see in the picture above. First, store 100 the q variable and then the address of q (i.e. 1312) is given to pointer variable p and at last the value of q is print through pointer variable (*p).

If you still have any problem or confusion, you can contact me...

How to display a colorful animated string/phrase

2011-12-17T08:18:00.000-08:00

#include<graphics.h>
#include<conio.h>
#include<stdio.h>
#include<dos.h> // for delay() function

void main(void)
{
int driver=DETECT, mode;
int i; //for loop
initgraph(&driver, &mode, "c:\\TC\\bgi" );
textcolor(BLACK);
for(i=0;i<=400;i++)
{
clrscr();
setcolor(i/15); //set text/string color
outtextxy(20+i,150,"**C Language Codes**"); //see the description below
delay(30); //slow down the loop
}
getch();
closegraph();
}

What is outtextxy(); ?

It is a built-in function defined in the header file "graphics.h". This function used to display graphical string. The general syntax is as follows:
outtextxy(x-coordinate, y-coordinate, "String to display");

In the above program, outtextxy() function is put into for loop to make the text animated. As you can see that variable i is written with the x-coordinate whereas, the y-coordinate remains constant which means the text will move towards left to right on the screen.

If you still have any question, you can ask me freely...

Draw a colorful Circle

2011-12-17T07:55:00.000-08:00

#include<graphics.h>
#include<conio.h>
#include<stdio.h>

void main(void)
{
int driver=DETECT, mode;
int xc1=320, yc1=240;

initgraph(&driver, &mode, "c:\\TC\\bgi" );
setcolor(7); //edge color
setfillstyle(SOLID_FILL,GREEN); // fill inside the circle
circle(xc1,yc1,100); // create a circle
floodfill(xc1,yc1,7); // flood color
getch();
closegraph();
}

Output:

If you have any question, you can ask me freely...

How to Initialize Graphics mode in C language

2011-11-18T19:23:00.001-08:00

/*Header Files*/
#include<stdio.h> //for input/output purpose
#include<conio.h> //for getch() function
#include<graphics.h> //for graphics functions
void main()
{
int driver=DETECT, mode; //auto detect the driver
int x=320, y=240, radius=100; // initialization
initgraph(&driver , &mode , "c:\\tc\\bgi"); // all necessary graphics files in BGI folder
circle(x , y, radius); //create a circle
getch(); // waits for key press
closgraph(); //close graphics mode
}

The above program will give the following output:

Program to identify the prime number

2011-08-17T08:53:00.000-07:00

Code:

#include<stdio.h>

#include<conio.h>

void main()

{

int num,flag=0,a;

printf("Enter an integer: ");

scanf("%d",&num);

//Logic for prime number

if(num==2)

printf("%d is Prime Number.",num);

else

{

for(a=2;a<num;a++)

{

if(num%a==0)

flag=1;

}

if(flag==1)

printf("%d is not a Prime Number.",num);

else

printf("%d is Prime Number.",num);

getch();

}

Result:

Enter an integer: 8

8 is not a Prime Number.

If you have any confusion about that program, contact me freely :)

Interchanging two variables without using the third one

2011-08-17T08:46:00.000-07:00

Using less variables is a sign of good programming. Here's the example program to interchanging the values of two variables without using third variable.

Code:

#include<stdio.h>

#include<conio.h>

void main()

{

//Initialization

int var1,var2;

printf("Enter two integers\n");

//Taking input from user

printf("a = ");

scanf("%d",&var1);

printf("b = ");

scanf("%d",&var2);

var1=var1+var2;

var2=var1-var2;

var1=var1-var2;

printf("a = %d\n",var1);

printf("b = %d\n",var2);

getch();

}

Result:

Enter two integers

a = 5

b = 11

a = 11

b = 5

An Array of String (Security)

2011-06-16T03:45:00.000-07:00

#define MAX 5
#define LEN 40

void main(void)
{
int dex;
int enter=0;
char name[40];
static char list[MAX][LEN]={ "Muzammil", "Nigel", "Katrina",
"Alistair" };
printf("Enter your name:"):
gets(name);
for(dex=0;dex<MAX;dex++)
if(strcmp(&list[dex][0],name)==0)
enter = 1;
if(enter==1)
printf("You may enter, oh honored one.");
else
printf("Guards! Remove this person!");
}

Output:
There are two possible outcomes when you interact with this program. Either your name is on the list:

Enter your name: Muzammil
You may enter, oh honored one.

or it isn't:

Enter your name: George
Guards! Remove this person!

The String I/O Functions gets() and puts()

2011-06-16T03:07:00.000-07:00

void main(void)
{
char name[81];

puts("Enter your name: ");
gets(name);
puts("Greetings, ");
puts(name);
}

Output:

Enter your name:
Muzammil Versiani
Greetings,
Muzammil Versiani

Switch Case in C

2011-06-09T04:01:00.001-07:00

The basic form of a switch statement is:

switch (variable) { case expression1: do something 1; break; case expression2: do something 2; break; .... default: do default processing; }

In the c program below, if you enter 5 , it will display you entered 5, else if the condition fails it will display the default , that is "i don't know what u entered". The break statement terminates the loop.

Another Example of Switch Case Program:

switch( marks ) { case 'A' : printf( "A++" ); break; case 'B' : printf( "A+" ); break; case 'C' : printf( "A" ); break; case 'D' : printf( "B" ); break; case 'F' : printf( "C" ); break; default : printf( "YOU FAILED" ); break; }

The keyword break must be included at the end of each case statement. The default clause is optional

We also have a continue statement which is used with switch case.

A continue statement causes a jump to the loop-continuation portion of the smallest enclosing iteration statement; that is, to the end of the loop body.

Switch Case in C

2011-06-09T04:00:00.000-07:00

The basic form of a switch statement is:

switch (variable) { case expression1: do something 1; break; case expression2: do something 2; break; .... default: do default processing; }

Another Example of Switch Case Program:

The keyword break must be included at the end of each case statement. The default clause is optional

We also have a continue statement which is used with switch case.

A continue statement causes a jump to the loop-continuation portion of the smallest enclosing iteration statement; that is, to the end of the loop body.

String Variables

2011-06-01T04:46:00.000-07:00

void main(void)
{
char name[81];
printf("Enter your Name: ");
scanf("%s",name);
printf("Welcome!, %s",name);
getch();
}

Output:

Enter your Name: Muzammil
Welcome!, Muzammil

If you have any question, you can ask me freely!

Sorting an Array (increasing order)

2011-06-01T04:41:00.000-07:00

#define MAXSIZE 20
void sort(int[],int);

void main (void)
{
static int list[MAXSIZE];
int size=0;
int dex;
do
{
printf("Type Number: ");
scanf("%d",&list[size]);
}
while(list[size++] != 0);
sort(list,--size);
for(dex=0;dex<size;dex++)
printf("%d\n",list[dex]);

}
void sort(int[list],int size)
{
int out,in,temp;
for(out=0;out<size-1;out++)
for(in=out+1;in<size;in++)
if(list[out]>list[in])
{
temp = list[in];
list[in] = list[out];
list[out] = temp;
}
}

Output:
Type Number: 46
Type Number: 25
Type Number: 73
Type Number: 58
Type Number: 33
Type Number: 18
Type Number: 0
18
25
33
46
58
73

If you have any question, you ask me freely!

Which Number is Largest? / Array

2011-05-31T06:37:00.000-07:00

#define MAXSIZE 20
int max(int[], int);
void main()
{
int list[MAXSIZE];
int size=0;
int num;
do
{
printf("Type number: ");
scanf("%d",list[size]);
}
while(list[size++] != 0);
num=max(list,size-1);
printf("Largest Number is %d",num);
}
int max(int list[],int size)
{
int dex,max;
max = list[0];
for(dex=1;dex<size;dex++)
if(max < list[dex])
max = list[dex];
return(max);
}

Output:

Type Number: 42
Type Number: 1
Type Number: 64
Type Number: 33
Type Number: 27
Type Number: 0
Largest Number is 64

Arrays

2011-05-30T06:51:00.000-07:00

If you have collection of similar data elements, you may find it inconvenient to give each one a unique variable name. For instance, suppose you wanted to find the average temperature for a particular week. If each day's temperature had a unique variable name, you would end up reading in each value separately like this:

printf("Enter Sunday Temperature: ");
scanf("%d",&suntmp);
printf("Enter Monday Temperature: ");
scanf("%d",&montmp);
---------------

and so on for each day of the week, with an expression for the average such as this:

(suntmp+montmp+tuetmp+wedtmp+thutmp+fritmp+sattmp)/7

This is on altogether unwieldy business, especially if you want to average the temperature for a month or a year.
Clearly we need a convenient way to refer to such collections of similar data elements. The array fills the bill. It provides a way to refer to individual items in a collection by using the same variable name, but differing subscripts, or numbers. Let's see how we'd solve our problem of averaging the temperature for a week using arrays:

void main()
{
int temper[7];
int day,sum;

for(day=0;day<7;day++)
{
printf("Enter Temperature for day %d: ",day);
scanf("%d",&temper[day]);
}

sum=0;
for(day=0;day<7;day++)
sum+=temper[day];
printf("Average is %d.",sum/7);

}

This program reads in seven temperatures, stores them in an array and then, to calculate an average temperature, reads them back out of the array, adding them together, and divide by 7. Here's a result:

Enter Temperature for day 0: 74
Enter Temperature for day 1: 76
Enter Temperature for day 2: 77
Enter Temperature for day 3: 77
Enter Temperature for day 4: 64
Enter Temperature for day 5: 66
Enter Temperature for day 6: 69
Average is 71.

If you have any question, you can ask me freely!

Functions that Return a Value

2011-05-27T03:29:00.000-07:00

#include<stdio.h>
#include<conio.h>
char getlc(void);

void main(void)
{
char chlc;
printf("Type 'a' for first selection, 'b' for second: ");
chlc=getche();
switch(chlc)
{
case'a':
printf("\nYou typed an 'a'.");
break;
case'b':
printf("\nYou typed a 'b'.");
break;
default:
printf("\nYou chose a nonexistent selection.");
}
}
char getlc(void)
{
char ch;
ch=getche();
if(ch>64&&ch<91)
ch=ch+32;
return(ch);
}

Output:
Type 'a' for first selection, 'b' for second: a
You typed an 'a'.

Type 'a' for first selection, 'b' for second: A

You typed an 'a'.

Type 'a' for first selection, 'b' for second: c

You chose a nonexistent selection.

Finding LCM and GCD

2011-05-26T06:29:00.000-07:00

Finding LCM and GCD

#include<stdio.h>
#include<conio.h>

void main()
{
int a[20],n,i,j,c,max,min;
unsigned long prod;
clrscr();
printf("Enter the no. of entries: ");
scanf("%d",&n);
printf("Enter the entries:
");
for(i=0;i<n;i++)
{
scanf("%d",&c);
if(c>0)
a[i]=c;
else
{
printf("Invalid Entry");
return;
}
}

max=a[0];
for(i=0;i<n;i++)
if(a[i]>=max)
max=a[i];
min=a[0];
for(i=0;i<n;i++)
if(a[i]<min)
min=a[i];

for(i=0,prod=1;i<n;i++)
prod=prod*a[i];

for(i=max;i<=prod;i+=max)
{

c=0;
for(j=0;j<n;j++)
if(i%a[j]==0)
c+=1;
if(c==n)
{
printf("The LCM of the nos: %d
",i);
break;
}
}

for(i=min;i>0;i--)
{
if (min%i==0)
{
c=0;
for(j=0;j<n;j++)
if(a[j]%i==0)
c+=1;
}
if(c==n)
{
printf("The GCD of the nos: %d",i);
break;
}
}
getch();
}

Calculate Area of a Polygon

2011-05-26T06:27:00.001-07:00

Program to calculate Area of a Polygon

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define MAX_VERT 50
enum {x, y};
typedef struct triangle {
double v1[2];
double v2[2];
double v3[2];
} triangle;
double area(triangle a);
double perimeter(double *vertices, int size);
double side(double *p1, double *p2);

int main(void)
{
int n, idx;
int triangles;
int index;
int xycount;
double xy;
double triangle_area;
double polygon_area;
double perim;
double polygon_vertices[MAX_VERT] = {0.0};
triangle a;
FILE *data;

xycount = 0;
polygon_area = 0;
if((data = fopen("pvert.txt", "r")) == NULL)
{
fprintf(stderr, "can't open data file
");
exit(EXIT_FAILURE);
}

/* Read x-y coordinates of the vertices
of the polygon from a file. */
while(fscanf(data, "%lf", &xy) == 1)
polygon_vertices[xycount++] = xy;
fclose(data);
idx = 0;
/* triangles in polygon = vertices - 2 */
triangles = (xycount / 2) - 2;
putchar('
');

for(index = 2, idx = 0; idx < triangles; index += 2, ++idx)
{
/* Load vertices of a triangle into struct.
1st vertex of the polygon will be the 1st
vertex of each triangle. index holds the
starting index of each consecutive set of
triangle vertices after the 1st. */
a.v1[x] = polygon_vertices[0];
a.v1[y] = polygon_vertices[1];
a.v2[x] = polygon_vertices[index+0];
a.v2[y] = polygon_vertices[index+1];
a.v3[x] = polygon_vertices[index+2];
a.v3[y] = polygon_vertices[index+3];

/* calculate the area of the triangle */
triangle_area = area(a);
printf("area of triangle = %.2f
", triangle_area);

/* add triangle area to polygon area */
polygon_area += triangle_area;
}
printf("
area of polygon = %.2f
", polygon_area);

/* calculate the perimeter of the polygon */
perim = perimeter(polygon_vertices, xycount);
printf("perimeter of polygon = %.2f
", perim);

return 0;
}

/* calculate triangle area with Heron's formula */
double area(triangle a)
{
double s1, s2, s3, S, area;

s1 = side(a.v1, a.v2);
s2 = side(a.v2, a.v3);
s3 = side(a.v3, a.v1);
S = (s1 + s2 + s3) / 2;
area = sqrt(S*(S - s1)*(S - s2)*(S - s3));

return area;
}

/* calculate polygon perimeter */
double perimeter(double *vertices, int size)
{
int idx, jdx;
double p1[2], p2[2], pfirst[2], plast[2];
double perimeter;

perimeter = 0.0;
/* 1st vertex of the polygon */
pfirst[x] = vertices[0];
pfirst[y] = vertices[1];
/* last vertex of polygon */
plast[x] = vertices[size-2];
plast[y] = vertices[size-1];
/* calculate perimeter minus last side */
for(idx = 0; idx <= size-3; idx += 2)
{
for(jdx = 0; jdx < 4; ++jdx)
{
p1[x] = vertices[idx];
p1[y] = vertices[idx+1];
p2[x] = vertices[idx+2];
p2[y] = vertices[idx+3];
}
perimeter += side(p1, p2);
}
/* add last side */
perimeter += side(plast, pfirst);

return perimeter;
}

/* calculate length of side */
double side(double *p1, double *p2)
{
double s1, s2, s3;

s1 = (p1[x] - p2[x]);
s2 = (p1[y] - p2[y]);
s3 = (s1 * s1) + (s2 * s2);

return sqrt(s3);
}

Chat Program in C

2011-05-26T06:26:00.000-07:00

#include <stdio.h>

#include<conio.h>

#include<process.h>

#include<string.h>

char c[30],ch[70];

FILE *stream,*stream1;

void read(void)

{ stream1 = fopen("//computer21/s/read.txt","r");

fread(ch,1000,1,stream1);

printf("%s",ch);

fclose(stream1); }

void clearhist()

{ stream=fopen("//computer21/s/write1.txt","w");

fprintf(stream," ");

fclose(stream); }

void main ()

{ int i,d=0;

char temp,name[10];

clrscr ();

gotoxy(10,12);

printf("Enter Name:");

scanf("%s",name);

clrscr ();

for(i=0;i<=100;i++)

{ clrscr ();

read();

gotoxy(1,21);

printf("--------------Press ENTER Without Message to Check For New
Message--------------");

gotoxy(1,23);

printf("Enter the Message(30 chars max) : ");

gets(c);

//checking message

if((c[0]=='e')&&(c[1]=='x')&&(c[2]=='i')&&(c[3]=='t'))

{ clearhist ();

exit(0); }

if(c[0]!=' //checking message for "enter"

Create a Calender

2011-05-26T06:24:00.001-07:00

#include <stdio.h>
#include <conio.h>
#include <process.h>
#include <ctype.h>

unsigned long days=0;
//stores the days elapsed since 01.01.1899
void display(int n)
//contains the number of days to display
{
int i, column, k, flag=0, j;
printf("Sun Mon Tues Wed Thur Fri Sat
");
for(i=1; i<=n; i++)
{
k=days%7;//remainder gives the starting day of each month
if(flag==0)
{
for(j=1; j<=k; j++)//controls tabs of first week
printf(" ");
flag=1;//ensures that block is only executed once
column=k;
}
printf("%d ", i);
column++;
if(column%7==0)//prints new line at the end of each week
printf("
");
}
printf("
Press any key to continue

");
getch();
}

void calculate(int year)
//function calculates no. of days elapsed since 1899
{
int i, month;
for(i=1899; i<year; i++)
//1899 chosen because Jan 1, 1899 is a Sunday
{
if((i%400==0)?1:((i%100==0)?0:((i%4==0)?1:0)))

/*This is because a leap year does not strictly fall on every
fourth year. If a year is divisible by 4, then it is a leap
year, but if that year is divisible by 100, then it is
not a leap year. However, if the year is also divisible by
400, then it is a leap year. Eg: 1900 is not a leap year*/

days+=366;
else
days+=365;
}
for(month=1; month<=12; month++)
{
printf("

");
switch(month)
/*switch case used to display each month and
increment no. of days*/
{
case 1: printf(" JANUARAY %d

", year);
display(31);
days+=31;
break;
case 2: printf(" FEBURARY %d

", year);
if((year%400==0)?1:((year%100==0)?0:((year%4==0)?1:0)))
{
display(29);
days+=29;
}
else
{
display(28);
days+=28;
}
break;
case 3: printf(" MARCH %d

", year);
display(31);
days+=31;
break;
case 4: printf(" APRIL %d

", year);
display(30);
days+=30;
break;
case 5: printf(" MAY %d

", year);
display(31);
days+=31;
break;
case 6: printf(" JUNE %d

", year);
display(30);
days+=30;
break;
case 7: printf(" JULY %d

", year);
display(31);
days+=31;
break;
case 8: printf(" AUGUST %d

", year);
display(31);
days+=31;
break;
case 9: printf(" SEPTEMBER %d

", year);
display(30);
days+=30;
break;
case 10: printf(" OCTOBER %d

", year);
display(31);
days+=31;
break;
case 11: printf(" NOVEMBER %d

", year);
display(30);
days+=30;
break;
case 12: printf(" DECEMBER %d

", year);
display(31);
days+=31;
break;
}
}
}

void main()
{
char ch[10];
int i, year, choice;
do
{
clrscr();
days=0;
printf("Enter the year in 'yyyy' format:
");
scanf("%s", ch);//stores input first as a string
for(i=0; i<strlen(ch); i++)
if(ch[i]<'0' || ch[i]>'9')//checks for invalid inputs
{
printf("

Invalid Year!");
printf("

END OF PROGRAM");
getch();
exit(0);
}
year = atoi(ch);
//converts the year from string to integer datatype
clrscr();
printf("

Calender for Year %d", year);
printf("
**********************

");
calculate(year);
//calls function to calculate no. of days elapsed

printf("
*******************************************
");
printf("

Press 1 to continue, 2 to exit
");
scanf("%d", &choice);
}while(choice==1);
clrscr();
printf("

END OF PROGRAM");
getch();
}

Analog and Digital Clock

2011-05-26T06:23:00.000-07:00

# include <graphics.h>
# include <stdio.h>
# include <dos.h>
# include <string.h>
# include <math.h>
# define pi 3.141592654
int x;
float x30,x60,y30,y60;
void paint1()
{
setcolor(GREEN);
outtextxy(297,60," ");
outtextxy(297,332," ");
outtextxy(435,198," ");
outtextxy(160,198," ");
setcolor(RED);
outtextxy(375,85,"è");
outtextxy(420,260,"è");
outtextxy(170,135,"è");
outtextxy(220,310,"è");
setcolor(LIGHTBLUE);
outtextxy(420,135,"ì");
outtextxy(375,310,"ì");
outtextxy(220,83,"ì");
outtextxy(175,260,"ì");
}
void paint2()
{
setcolor(RED);
outtextxy(297,60,"è");
outtextxy(297,332,"è");
outtextxy(435,198,"è");
outtextxy(160,198,"è");
setcolor(LIGHTBLUE);
outtextxy(375,85,"ì");
outtextxy(420,260,"ì");
outtextxy(170,135,"ì");
outtextxy(220,310,"ì");
setcolor(GREEN);
outtextxy(420,135," ");
outtextxy(375,310," ");
outtextxy(220,83," ");
outtextxy(175,260," ");
}
void paint3()
{
setcolor(LIGHTBLUE);
outtextxy(297,60,"ì");
outtextxy(297,332,"ì");
outtextxy(435,198,"ì");
outtextxy(160,198,"ì");
setcolor(GREEN);
outtextxy(375,85," ");
outtextxy(420,260," ");
outtextxy(170,135," ");
outtextxy(220,310," ");
setcolor(RED);
outtextxy(420,135,"è");
outtextxy(375,310,"è");
outtextxy(220,83,"è");
outtextxy(175,260,"è");
}
void graph()
{
cleardevice();
setcolor((++x)%15+1);
if(x%2)
outtextxy(180,10,"X");
else
outtextxy(130,20,"X");
setcolor(GREEN);
circle (300,200,150);
circle(300,200,2);
setcolor(14);
circle (300,200,100);
setcolor(3);
circle (300,200,120);
setcolor(RED);
circle(300,50,2);
circle(450,200,2);
circle(150,200,2);
circle(300,350,2);
setcolor(BLUE);
circle(300+x30,200+y30,2);//1
circle(300-x30,200+y30,2);//11
circle(300+x30,200-y30,2);//5
circle(300-x30,200-y30,2);//7

circle(300+x60,200+y60,2);//2
circle(300+x60,200-y60,2);//4
circle(300-x60,200-y60,2);//8
circle(300-x60,200+y60,2);//10
if(x%2)
{
setcolor(x);
outtextxy(300+x30*1.1,200+y30*1.1,"1");//1
outtextxy(300-x30*1.1,200+y30*1.1,"11");//11
outtextxy(300+x30*1.1,200-y30*1.1,"5");//5
outtextxy(300-x30*1.1,200-y30*1.1,"7");//7

outtextxy(300+x60*1.1,200+y60*1.1,"2");//2
outtextxy(300+x60*1.1,200-y60*1.1,"4");//4
outtextxy(300-x60*1.1,200-y60*1.1,"8");//8
outtextxy(300-x60*1.15,200+y60*1.1,"10");//10
outtextxy(460,200,"3");
outtextxy(300,360,"6");
outtextxy(140,200,"9");
outtextxy(290,40,"12");
}
}

void plot(int h , int m , int s)
{
char a[2],b[2],c[2];
setcolor( LIGHTCYAN );
itoa(h,a,10);
outtextxy(450,100,a);
outtextxy(470,100,":");

itoa(m,a,10);
outtextxy(490,100,a);
outtextxy(510,100,":");

itoa(s,a,10);
outtextxy(530,100,a);
setcolor( LIGHTGREEN );
if( h<13 )
outtextxy( 290 , 250 , "AM");
else
outtextxy( 290 , 250, "PM");
h=h%12;
setlinestyle(SOLID_LINE , 1 , 3);
setcolor( RED );
line(300,200,300+floor(100*cos(((h*5+m/10.0)*6-90)*pi/180)),
200+floor(100*sin(((h*5+m/10.0)*6-90)*pi/180)));
setcolor(BLUE);
setlinestyle(SOLID_LINE,1,3);
line(300,200,300+floor(120*cos((m*6-90)*pi/180)),
200+floor(120*sin((m*6-90)*pi/180)));
setcolor(MAGENTA);
setlinestyle(SOLID_LINE,1,1);
line(300,200,300+floor(120*cos((s*6-90)*pi/180)),
200+floor(120*sin((s*6-90)*pi/180)));
}

void timexy()
{
int h,m,s;
struct time t;
while(1)
{
//clrscr();
cleardevice();
graph();
gettime(&t);
//printf("

The current time is:
%2d:%02d:%02d.%02d
",
// t.ti_hour, t.ti_min, t.ti_sec,t.ti_hund);
h=t.ti_hour;
m=t.ti_min;
s=t.ti_sec;
if(s%3==0)
paint1();
else if(s%3==1)
paint3();
else paint2();
plot(h,m,s);
delay(995);
}
}
main()
{
int i=DETECT,m;
char a[100],b[10]="jalpari";
x30=floor(150*cos((30-90)*pi/180));
y30=floor(150*sin((30-90)*pi/180));
x60=floor(150*cos((60-90)*pi/180));
y60=floor(150*sin((60-90)*pi/180));
initgraph(&i,&m,"d:\tc\bgi");
i=0;
printf("
PASSWORD==>");
do
{
a[i]=getch();
if(!(a[i]==(char)13))
{
printf("vasim");
i++;
}
else {a[i]='

The Switch Statement

2011-05-26T03:41:00.000-07:00

The switch statement is similar to the else-if construct but has more flexibility and a clearer format. Let's create a four function calculator using switch statement:

included files
void main()
{
float num1=1.0,num2=1.0;
char operator;
while(!(num1==0.0 && num2==0.0))
{
printf("Type number, operator, number\n");
scanf("%f %c %f",&num1,&operator,&num2);
switch(operator)
{
case'+':
printf(" = %f",num1 + num2);
break;
case'-':
printf(" = %f",num1 - num2);
break;
case'*':
printf(" = %f",num1 * num2);
break;
case'/':
printf(" = %f"num1 / num2);
break;
default:
printf("Unknown Operator!");
}
printf("\n\n")
}
getch();
}

In the above code, the statement 'case' is working as 'if', while 'default' is working as 'else' statement...

If you have any question, you can ask me freely!

if-else Statement

2011-05-25T06:32:00.000-07:00

It is a conditional expression and easy to use.

#include<stdio.h>
#include<conio.h>
void main()
{
char ch;
clrscr();
ch=getche();
if(ch=='y')
printf("\nYou typed y");
else
printf("\nYou didn't type y");
getch();
}

In the above code when you type 'y', the output will be "You typed y" other it will print "You didn't type y".

If you have any question, you can ask me freely!

Program to count words and characters in a sentence

2011-05-25T06:21:00.000-07:00

#include<stdio.h>
#include<conio.h>
void main()
{
int wordcnt=0;
int charcnt=0;
char ch;
clrscr();
printf("Type a sentence: ");
while((getche()) != '\r')
{
charcnt++;
if(ch==' ')
wordcnt++;
}
printf("\nTotal characters are: %d",charcnt);
printf("\nTotal words are: %d",wordcnt+1);
getch();

}

The do-while Loop / How to restart the program?

2011-05-24T01:55:00.000-07:00

#include<stdio.h>
#include<conio.h>
void main()
{
int num;
char ch;
clrscr();
do{
printf("Enter a number");
scanf("%d",&num);
printf("\n\n");
printf("You entered %d",num);
printf("Press 'y' to restart again?");
ch=getche();
}
while(ch=='y');
getch();

}

If you have question, you can ask me freely!