Find the G.C.D of two number

#include<stdio.h>

#include<conio.h>

void main()

{

int x,y,t;

printf("Enter two number:-");

scanf("%d%d",&x,&y);

if(x<0)

x=-x;

if(y<0)

y=-y;

if((x==0)||(y==0))

printf("is not possible:-\n");

else

{

while(x!=y)

{

if(x>y)

{

t=x;

x=y;

y=t;

}

y=y-x;

}

printf("The GCD is=%d",x);

}

getch();

}