c++

#include <bits/stdc++.h>

using namespace std;

int main(){

    stack <int> s;

    int a, b, number = 0, sum = 0;

    char c;

    while (c != '@'){

        c = getchar();

        if (c == '0'){

            s.push(number)

            number = 0;

            continue;

        } if (c >= '0' && c <= '9') number = number * 10 + (c - '0');

        else {

            a = s.top(); s.pop();

            b = s.top(); s.pop();

            if (c == '+') s.push(a + b);

            else if (c == '-') s.push(a - b);

            else if (c == '*') s.push(a * b);

            else if (c == '/') s.push(b / a); }}

cout << s.top();

return 0;

}

2021年12月4日放在了草稿箱，翻的时候发现的

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