C program find the GCD of the 2 numbers using functions

/*WAP to find the  GCD of the 2 numbers using functions*/
#include<stdio.h>
void main()
{	
 int gcd(int,int);
 int m,n;
 clrscr();
 printf("Input 2 Numbers-\n");
 scanf("%d%d",&m,&n);
 printf("GCD of %d and %d is %d",m,n,gcd(m,n));
 getch();
}
int gcd(int x, int y)
  {
   while(x!=y)
   {
     if(x>y)
     x=x-y;
     else
     if(y>x)
     y=y-x;
   }
 return(x);
}

Output

Input 2 Numbers-
12 24
GCD of 12 and 24 is 12

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