Fixed it

#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;
int value[256];
char operation;
char continueno;
bool firstpass = false;
int total;
int caculation(int number1, int number2)
{
    if(operation == '+')
    {
        return number1 + number2;
    }
        if(operation == '-')
    {
        return number1 - number2;
    }
        if(operation == '*')
    {
        return number1 * number2;
    }
        if(operation == '/')
    {
        return number1 / number2;
    }
}

int _tmain(int argc, _TCHAR* argv[])
{

    for (;;)
    {
        if(firstpass = false)
        {
        cout << "Welcome to the C++ console tutorial with arrays\nThis is a custom tutorial to see how much I know in pointless console C++"
        "\nEnjoy!\nPlease enter in your first value\n";
        }
        else{
            cout << "Please enter in your first value";
        }
        cin >> value[1];
        cout << "\nGood, now please enter in your second value";
        cin >> value[2];
        cout << "Good, now enter in a operation sign please.";
        cin >> operation;
        total = caculation(value[1],value[2]);
        cout << "Your total is " << total << endl << "Would you like to try again?";
        cin >> continueno;
        if (continueno == 'y' || continueno == 'Y')
        {
            continue;
            firstpass = true;
        }
                 break;
    }
}