C is a easy to learn procedural language.
C Graphics :
How to draw a Circle:
How to draw a Line: More>>
/*Accept a number and check whether it is perfect or not*/
/*A number that is equal to sum of its factors. eg: 6 is perfect 1+2+3=6*/
#include<stdio.h>
#include<conio.h>
void main()
{
int no,i,sum=0;
clrscr();
printf("Enter a no:-");
scanf("%d",&no);
for(i=1;i<no;i++)
{
if(no%i==0)
sum=sum+i;
}
if(sum==no)
printf("%d is a perfect no",no);
else
printf("Not a perfect no");
getch();
}
String Handling in C-programming:
#include<stdio.h>#include<conio.h>
#include<string.h>
void main()
{
char a[80];
int i=0,j,vcnt=0;
clrscr();
printf("Enter a string\n");
gets(a);
while(a[i]!='\0')
{
if(a[i]=='a'||a[i]=='e'||a[i]=='i'||a[i]=='o'||a[i]=='u')
{ vcnt++;
}
i++;
}
printf("\nvowel count=%d",vcnt);
getch();
}
#include<stdio.h>#include<conio.h>
void main()
{
int r,c;
clrscr();
for(r=1;r<=5;r++)
{
if(r==1||r==5)
for(c=1;c<=5;c++)
printf("*");
else
printf("* *");
printf("\n");
}
getch();
}
#include<stdio.h>#include<conio.h>
void main()
{
int r,c,sp;
clrscr();
for(r=1;r<=9;r++)
{
for(sp=9;sp>r;sp--)
printf(" ");
for(c=r;c>=1;c--)
printf("%d",c);
for(c=2;c<=r;c++)
printf("%d",c);
printf("\n");
}
getch();
}
#include<stdio.h>#include<conio.h>
void main()
{
int r,c,i;
clrscr();
for(r=90;r>=65;r--)
{
for(c=65;c<=r;c++)
printf("%c",c);
for(i=r-1;i>=65;i--)
printf("%c",i);
printf("\n");
}
getch();
}
#include<stdio.h>#include<conio.h>
void main()
{
int r,c,sp;
clrscr();
for(r=9;r>=1;r--)
{
for(sp=9;sp>r;sp--)
printf(" ");
for(c=r;c>=1;c--)
printf("%d",c);
for(c=2;c<=r;c++)
printf("%d",c);
printf("\n");
}
getch();
}
#include<stdio.h>#include<conio.h>
void main()
{
int r,c;
char ch;
clrscr();
for(r=1;r<=26;r++)
{
ch='A' ;
for(c=1;c<=r;c++,ch++)
printf("%c",c%2==0?ch+32:ch);
printf("\n");
}
getch();
}
#include<stdio.h>#include<conio.h>
void main()
{
int r,c,i;
clrscr();
for(r=9;r>=1;r--)
{
for(c=1;c<=r;c++)
printf("%d",c);
for(i=r-1;i>=1;i--)
printf("%d",i);
printf("\n");
}
getch();
}
C Graphics :
How to draw a Circle ?
#include<graphics.h>
void main()
{
int gm,gd=0;
initgraph(&gd,&gm,"G:\\tc\\bgi");
/*used to start the graphics system 3rd parameter is location of Graphics Library*/
circle(300,300,100); // built in function parameters are x, y and radius
getch();
}
How to draw a Line ?
#include<graphics.h>
void main()
{
int gm,gd=0;
initgraph(&gd,&gm,"G:\\tc\\bgi");
line(100,100,300,100); // built in function parameters are x1, y1 and x2,y2
getch();
}
How to draw a Arc ?
#include<graphics.h>
void main()
{
int gm,gd=0;
initgraph(&gd,&gm,"G:\\tc\\bgi");
setcolor(12);//set light red color as current
arc(200,200,90,270,100); //parameters are x,y, start angle, end angle and radius of arc.
getch();
}
How to draw a Rectangle ?
#include<graphics.h>
void main()
{
int gm,gd=0;
initgraph(&gd,&gm,"G:\\tc\\bgi");
setcolor(2); //set green color
outtextxy(200,200,"Welcome to Graphics"); //parameters are x,y and Message.
getch();
}
User Interaction in C ?
#include<graphics.h>
void main()
{
int gm,gd=0;
initgraph(&gd,&gm,"G:\\tc\\bgi");
setcolor(2); //set green color
bar(150,150,400,300);
outtextxy(200,200,"Welcome to Graphics"); //parameters are x,y and Message.
getch();
}