为什么本机验证可通过这里runtime?

winner999 @ 2024-11-20 19:07:47

#include <bits/stdc++.h>
using namespace std;
int main () {
    int a,b;
    char c;
    cin >> a >> b >> c;
    if (c == '+') {
        cout << a+b;
    }else if (c == '-') {
        cout << a - b;
    }else if (c == '*') {
        cout << a * b;
    }else if (c == '/') {
        cout << a / b;
    }else if ((a == 0 || b == 0) && c == '/' ){
        cout << "Divided by zero!";
    }else {
        cout << "Invalid operator";
    }
    return 0;
}

by Hero_Broom @ 2024-11-20 19:13:21

@winner999

（求关）

#include <bits/stdc++.h>
using namespace std;
int main () {
    int a,b;
    char c;
    cin >> a >> b >> c;
    if (c == '+') {
        cout << a+b;
    }else if (c == '-') {
        cout << a - b;
    }else if (c == '*') {
        cout << a * b;
    }else if (c == '/') {
        if ((a == 0 || b == 0) && c == '/' ){
            cout << "Divided by zero!";
        }
        else cout << a / b;
    }
    else {
        cout << "Invalid operator";
    }
    return 0;
}

by Hero_Broom @ 2024-11-20 19:15:19

@winner999 如果为除法且b为0时会直接进到你 cout<<a/b 的地方，b=0 就re了，他不会进到你 Devided by 0 里面

by XuYueming @ 2024-11-20 19:17:09

@Hero_Broom 请不要误导别人，仅需要特判除数为零

by XuYueming @ 2024-11-20 19:17:42

@Hero_Broom 抱歉，原来他原先代码就是这样写的

by Hero_Broom @ 2024-11-20 19:18:27

@XuYueming 所以不是才说把判断除数为零的情况放到 c=='/'里

by XuYueming @ 2024-11-20 19:34:10

@Hero_Broom 我是指，不能特判被除数为零的情况