rt,本地运行没有错啊

#include<iostream>
using namespace std;
int main(){
    for(int i=i;i<=3;i++){
        int h,f,m,h1,f1,m1;
        cin>>h>>f>>m;
        cin>>h1>>f1>>m1;
        int cnt=0,cnt1=0;
        cnt+=h*3600+f*60+m;
        cnt1+=h1*3600+f1*60+m1;
        int shi=cnt1-cnt,s2,f2,m2;
        s2=shi/3600;
        shi%=3600;
        f2=shi/60;
        shi%=60;
        m2=shi;
        cout<<s2<<" "<<f2<<" "<<m2<<" "<<endl;
    }
}

求助各位dalao!QAQ