#include <stdio.h>

int main()
{
int m, n, i;
printf("qingshurulianggeshu:");
scanf("%d%d",&m,&n);
i=m%n;
while (i!=0)
{
m=n;
n=i;
i=m%n;
}
printf("shuchushi%d\n",i);
return 0;
}
不知道哪里错了，输出都是0

#include <stdio.h>

int main( void )
{
    unsigned m, n;
    scanf( "%d%d", &m, &n );

    for( ; n!=0; )
    {
        unsigned t = m;
        m = n;
        n = t%n;
    }
    printf( "%u\n", m );
}