编辑代码

#include <iostream>
using namespace std;
int main() {
    int a, b, s;
    char ch;
    cin >>a >>ch >>b;
    if (c == '+'){
        s = a + b;
    } else if (ch == '-'){
        s = a - b;
    } else if (ch == '*'){
        s = a * b;
    } else if (ch == '/'){
        s = a / b;
    }
	cout << s << endl;
	return 0;
}