文件目录

#include <iostream>
using namespace std;
int main()
{
    int a, b;
    char c;
    scanf("%d%c%d", &a, &c, &b);
    switch (c)
    {
    case '+':
        cout << a + b;
        break;
    case '-':
        cout << a - b;
        break;
    case '*':
        cout << a * b;
        break;
    case '/':
        cout << a / b;
        break;
    case '%':
        cout << a % b;
        break;
    }
    return 0;
}