//输入两个正整数m和n，求其最大公约数
using std::cout;
using std::cin;
using std::endl;
int main()
{
    int a,b,x,y;
    cout<<endl;
    cin>>a>>b;
    if(a>b)
    {
        x=a;
        y=b;
    }
    else
    {
        x=b;
        y=a;
    }
    if(x%y!=0)
    {
        while(x%y!=0)
        {
            x=x%y;
            y=y%x;
        }
    

        if(x=0)
            cout<<y;
        if(y=0)
            cout<<x;
    }
    else
        cout<<y;
    
    return 0;
}

我知道错的很厉害，但不知道错到哪了，请大家指点下

嗯，知道自己怎么错的了，谢谢啦

但是还有问题：#include <iostream>
using std::cout;
using std::cin;
using std::endl;
int main()
{
    int a,b,x,y;
    cout<<endl;
    cin>>a>>b;
    if(a>b)
    {
        x=a;
        y=b;
    }
    else
    {
        x=b;
        y=a;
    }
    if(x%y!=0)
    {
        while(x%y!=0)
        {
            x=x%y;
            y=y%x;
        }
        if(x==0)
            cout<<y;
        if(y==0)
            cout<<x;
    }
    else
        cout<<y;
    return 0;
}
感觉程序也没错吧，
但是当我输入64和14的时候，
电脑就会出现异常
说应用程序出错……