Factorial

int s=10;                                  //Global Variable
#include<stdio.h>
#include<conio.h>
main()
{
int sqr();
int ans;
clrscr();
ans=sqr();
printf("Side=%d\nSquare=%d\n",s,ans);
getch();
}


int sqr()
{
return s*s;
}


OUTPUT:

Side=10Square=100