!past

#include <iostream>
#include <string>
#include <stack>

void calc(std::stack <int> &arr_nums,
          std::stack <char> &arr_ops){
    int b = arr_nums.top();
    arr_nums.pop();
    int a = arr_nums.top();
    arr_nums.pop();
    char nya = arr_ops.top();
    switch(nya){
        case '+':   arr_nums.push(a+b); break;
        case '-':   arr_nums.push(a-b); break;
        case '*':   arr_nums.push(a*b); break;
        case '/':   arr_nums.push(a/b); break;
    }
    arr_ops.pop();
    std::cout << a << nya << b << '=' << arr_nums.top() << '\n';
}

void high(std::stack <int> &arr_nums,
          std::stack <char> &arr_ops,
          bool &counter, char symb){
    counter = false;
    if (arr_ops.empty() == false){
        char nya = arr_ops.top();
        char j = '*';
        char g = '/';
        if(nya == j ||  nya == g){
            calc(arr_nums, arr_ops);
            arr_ops.push(symb);
        }else{
        arr_ops.push(symb);
        }
    }else{
        arr_ops.push(symb);
    }
    std::cout << arr_ops.top() << '\n';
}

void low(std::stack <int> &arr_nums,
          std::stack <char> &arr_ops,
          bool &counter, char symb){
    counter = false;
    if (arr_ops.empty() == false){
        char z = arr_ops.top();
        if (z == '(' || z == ')'){
            arr_ops.push(symb);
        }else{
            calc(arr_nums, arr_ops);
            arr_ops.push(symb);
        }
    }else{
        arr_ops.push(symb);
    }
    std::cout << arr_ops.top() << '\n';
}
void nums(std::stack <int> &arr_nums,
          std::stack <char> &arr_ops,
          bool &counter, char symb){
    int v = (int)symb - 48;
    std::cout<< "int " << v << ' ';
    if (counter == true){
        int x = arr_nums.top();
        arr_nums.pop();
        arr_nums.push(x * 10 + v);
        std::cout << "Изменено " << arr_nums.top() <<'\n';
    }else{
        arr_nums.push(v);
        std::cout << "Добавлено " << arr_nums.top() <<'\n';
    }
    std::cout << arr_nums.top() << '\n';
}
int main(){
    std::cout << "Enter expression: ";
    std::string msg;
    std::cin >> msg;
    int n = msg.length();
    bool counter;
    std::stack<char> arr_ops;
    std::stack<int> arr_nums;
    std::string a = {'+','-','*','/','(', ')'};

    for (int i=0; i < n; i++){
        switch(msg.at(i)){
            case '*':   high(arr_nums, arr_ops, counter, msg.at(i)); break;
            case '/':   high(arr_nums, arr_ops, counter, msg.at(i)); break;
            case '+':    low(arr_nums, arr_ops, counter, msg.at(i)); break;
            case '-':    low(arr_nums, arr_ops, counter, msg.at(i)); break;
            case '(':
                counter = false;
                arr_ops.push(msg.at(i));
                break;
            case ')':
                counter = false;
                while(arr_ops.top() != '('){
                    calc(arr_nums, arr_ops);}
                arr_ops.pop();
                break;
            default:
                nums(arr_nums, arr_ops, counter, msg.at(i));
                counter = true;

        std::cout << i<< "/" << n << " " << msg.at(i) << "\n";
        }
    }
    while (arr_nums.size() > 1){calc(arr_nums, arr_ops);}
    std::cout << "Верхушка стека: "<< arr_nums.top() << "\n";
}