postfix-calculator/app.cpp at main · kox13/postfix-calculator · GitHub

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#include <iostream>
#include "stack.h"
#include "token.h"
#include "number.h"
#include "function.h"

using namespace std;

int main()
{
    Stack postfix;
    Stack operations;
    Stack numbers;
    char buffer[11];
    int n;

    cin >> n;

    while (n)
    {
        cin >> buffer;

        do
        {
            if (Token::IsNumber(buffer)) postfix.push(buffer);
            else if (Token::IsFunction(buffer)) operations.push(buffer);
            else if (Token::IsOperator(buffer))
            {
                while (!operations.empty() && operations.top().GetType() != TokenType::LEFT_PARENTHESES && operations.top().GetPrecedence() >= Token::GetPrecedence(buffer))
                    Stack::movetop(postfix, operations);

                operations.push(buffer);
            }
            else if (buffer[0] == ',')
            {
                while (!operations.empty() && operations.top().GetType() != TokenType::LEFT_PARENTHESES)
                    Stack::movetop(postfix, operations);

                Token* tmptop = operations.popptr();
                operations.top().IncrementElements();
                operations.push(tmptop);
            }
            else if (buffer[0] == '(') operations.push(buffer);
            else if (buffer[0] == ')')
            {
                while (!operations.empty() && operations.top().GetType() != TokenType::LEFT_PARENTHESES)
                    Stack::movetop(postfix, operations);

                operations.pop();

                if (!operations.empty() && operations.top().GetType() == TokenType::FUNCTION)
                    Stack::movetop(postfix, operations);
            }

            cin >> buffer;
        } while (*buffer != '.');

        while (!operations.empty())
            Stack::movetop(postfix, operations);

        postfix.reverse();

        cout << postfix << "\n";

        bool wasError = false;

        while (!postfix.empty())
        {
            Token* top = postfix.popptr();

            if (top->GetType() == TokenType::NUMBER)
            {
                numbers.push(top);
                continue;
            }

            cout << *top << " " << numbers;

            if (!top->Apply(numbers))
            {
                wasError = true;
                delete top;
                break;
            }

            cout << "\n";

            delete top;
        }

        if(!wasError) cout << numbers.top() << "\n\n";

        postfix.clear();
        numbers.clear();

        n--;
    }

    return 0;
}