#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,c;
clrscr();
printf("Enter 1st number = ");
scanf("%d",&a);
printf("Enter 2nd number = ");
scanf("%d",&b);
while(a%b!=0)
{
c=a%b;
a=b;
b=c;
}
printf("Greatest Common Divisor(GCD) = %d",b);
getch();
}
///////////////////////////////////////////////////////////////////////////
Copy & paste this code in your TC & run, then you will get output.......
If you have any problem please comment below.........