Calculator class

[koutsos1]

So I need help using classes to build a calculator class with the same functionality as the following calculator, but having the functions embedded with an object class. Any help would be greatly appreciated.

#include <iostream>
#include <vector>

using namespace std;

int main() {
    system("TITLE George's Calculator");
    system("COLOR 17");
	double temp;
	int i=0, j=0, counter=1;
	double result=0;
	char opr='*'; 
	vector<double> num(20); 
	vector<int> pluMin(19); 
	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 '+':
				pluMin[j]=1; j++; i++; counter++; num[i]=temp;
				break;
			case '-':
				pluMin[j]=2; j++; i++; counter++; num[i]=temp;
				break;
			case '*':
				num[i]=num[i]*temp;
				break;
			case '/':
				if(temp == 0){
				cout << "You can't divide by zero" << endl;
				}else{
				num[i]=num[i]/temp;
				}
				break;
			default:
				cout << "That is an invalid operation" << endl;
				break;
		}

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

	} while (loop);

	result=num[0]; i=1; j=0;
	for(;counter;i++,j++,counter--) {
		if (pluMin[j]==1) result = result + num[i];
		else if (pluMin[j]==2) result = result - num[i];
		else if (pluMin[j]==0) break;
		else cout << "Improper operations!"; 
	}
	cout << "\nResult:   " << result;
	cin >> result;
	return 0;
}

[Skillless]

Post the code you have so far, and what problems youre having with it

If your problem is i dont know how to write classes or structs, read the tutorial http://cplusplus.com/doc/tutorial/classes/

[koutsos1]

Here is what I have so far...
any help would be appreciated

#include <iostream>
#include <vector>
using namespace std;

class Calculator {
      public:
             void (i, j);
             int value;
             };
             
int main() {
    system("TITLE George's Calculator");
    system("COLOR 17");
	double temp;
	int i=0, j=0, counter=1;
	double result=0;
	char opr='*'; 
	vector<double> num(20); 
	vector<int> pluMin(19); 
	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 '+':
				pluMin[j]=1; j++; i++; counter++; num[i]=temp;
				break;
			case '-':
				pluMin[j]=2; j++; i++; counter++; num[i]=temp;
				break;
			case '*':
				num[i]=num[i]*temp;
				break;
			case '/':
				if(temp == 0){
				cout << "You can't divide by zero" << endl;
				}else{
				num[i]=num[i]/temp;
				}
				break;
			default:
				cout << "That is an invalid operation" << endl;
				break;
		}

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

	} while (loop);

	result=num[0]; i=1; j=0;
	for(;counter;i++,j++,counter--) {
		if (pluMin[j]==1) result = result + num[i];
		else if (pluMin[j]==2) result = result - num[i];
		else if (pluMin[j]==0) break;
		else cout << "Improper operations!"; 
	}
	cout << "\nResult:   " << result;
	cin >> result;
	return 0;
}

[Skillless]

First of all;

void (i, j);What are you trying to make here?

Also, remove either the j or i variable in main, theyre both the same throughout the whole function, you only need one, and itll make your code look a bit cleaner

3rd, what do you want your class to contain, just the numbers youre working with, or also the functions?

[koutsos1]

I need both the i and j otherwise my program will not properly execute. I would like the class to contain the functions and i thought that void (i, j) is needed to declare the class

[Skillless]

Heres an example on how to have the numbers and operators in your class, with an example function that returns operator(...)

#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[i];
	}
};

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[i]=1;
				i++;
				counter++;
				calc.num[i]=temp;
				break;
			case '-':
				calc.ope[i]=2;
				i++;
				counter++;
				calc.num[i]=temp;
				break;
			case '*':
				calc.num[i]=calc.num[i]*temp;
				break;
			case '/':
				if(temp == 0){
				cout << "You can't divide by zero" << endl;
				}else{
				calc.num[i] = calc.num[i]/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[i];
		else if (calc.ope[i-1]==2)
			result = result - calc.num[i];
		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;
}