คือต้องทำรายงานส่งอ.อะครับ ช่วยทีครับ
#include <iostream>
#include <vector>
#include <windows.h>
using namespace std;

class Calculator
{
    public:
    double num[20];
    int    ope[19];

    int GetOperator(int i)
    {
        return ope;
    }
};

int main() {
    system("TITLE George's Calculator");
    system("COLOR 17");

    Calculator calc;

    double temp;
    int i=0;
    int counter=1;
    double result=0;
    char opr='*';

    calc.num[0]=1;
    bool loop=1;

    cout << "You can multiply, divide, add and subtract using *,/,+,-, respectively\n\n";
    cout << "Enter the = sign at the end of what you want calculated and press enter\n\n";
    do {
        cout << "Enter what you want to be calculated: ";
        cin >> temp;
        switch (opr) {
            case '+':
                calc.ope=1;
                i++;
                counter++;
                calc.num=temp;
                break;
            case '-':
                calc.ope=2;
                i++;
                counter++;
                calc.num=temp;
                break;
            case '*':
                calc.num=calc.num*temp;
                break;
            case '/':
                if(temp == 0){
                cout << "You can't divide by zero" << endl;
                }else{
                calc.num = calc.num/temp;
                }
                break;
            default:
                cout << "That is an invalid operation" << endl;
                break;
        }

        cout << "Operator: ";
        cin >> opr;
        if (opr=='=') loop=0;

    } while (loop);
    result = calc.num[0];
    i = 1;
    for(i = 1; i < counter; i++) {
        if (calc.ope[i-1]==1)
            result = result + calc.num;
        else if (calc.ope[i-1]==2)
            result = result - calc.num;
        else if
            (calc.ope[i-1]==0) break;
        else
            cout << "Improper operations!";

        cout << "Operator[" << i-1 << "] = " << calc.GetOperator(i-1) << ")";
    }
    cout << "\nResult:   " << result;
    cin >> result;
    return 0;
}