文件目录

#include <iostream>

using namespace std;
int main()
{
    int a, b;
    char c;
    cin >> a >> b >> c;
    if (int(c) == 43)
        cout << a + b;
    else if (int(c) == 45)
        cout << a - b;
    else if (int(c) == 42)
        cout << a * b;
    else if (int(c) == 47 && b != 0)
        cout << a / b;
    else if (int(c) == 47 && b == 0)
        cout << "Divided by zero!";
    else
        cout << "Invalid operator!";

    return 0;
}