12.c

适合于初学者的C程序

/* Note:Your choice is C IDE */
#include "stdio.h"
int main()
{
    int x,y,z;
    printf("input two integer numbers:");
    scanf("%d,%d",&x,&y);
    z=f(x,y);
    printf("%d",z);
    }
    int f(int x,y)
    {
    	while(x!=y)
    if(x>y)
    x=x-y;
    else y=y-x;
    return x;
}