编辑代码

#include <stdio.h>
int gongyinshu(int m,int n)
{
    int r=1;
    while(r!=0){
    r = m%n;
    m=n;
    n=r;
    }
    return m;
}
int main () {
    int m,n;
    m=12;
    n=12;
    printf("最大公因数为：%d",gongyinshu(m,n));
    return 0;
}