My First Calculator In C++

[Bl4Ck.KiD...]

link of the program for those that want to use
http://www.sendspace.com/file/4mhn8e

heres the source code

//Bl4Ck.KiD...'s First Calculater In C++
#include <cstdlib>
#include <iostream>
 
using namespace std;
 
int main()
{
    double num;//1st number 
    double num2;//2nd number
    char choice;//if u dont have cant chose wat u want
    for (;;){
     do {
    system("title Bl4Ck.KiD...'s Calculater");//Sets title up top of CMD, Took From DeToX Thanks
    system("color 69");//changes text color, took from DeToX Thanks
    cout<<"Welcome To Bl4Ck.KiD...'s Calculater\n";
    cout<<"Make Sure To Use It Eveytime You Have Math Homework!\n";//prints it at the top
    cout<<"Choose A Number What You Want To Do, Or Press q To Quit\n";//prints it at the top
    cout<<"MAKE SURE TO HIT ENTER WHEN YOU SELECT A NUMBER!!!\n";//prints it at the top
    cout<<"\n";//new line
    cout<<"1 - Addition\n";//add
    cout<<"2 - Subtraction\n";//sub
    cout<<"3 - Division\n";//divid
    cout<<"4 - Multiplication\n";//multi
    cout<<"5 - Info\n";//info
    cin>>choice;
    } while ( choice < '1' || choice > '5' && choice != 'q');//if u chose 1 th 5 or if u hit q it exits
    if (choice == 'q') break;//ends program
    switch (choice) {//switch bewteen choices
           case '1'://addition case
                cout<<"\n";//new line
                cout<<"Enter Your Number You Want To Added, Then Hit Enter\n";//prints text then goes down one with \n
                cin>>num;//1st number 
                cout<<"\n";//new line
                cout<<"Enter Another Number To Get Added With It, Then Hit Enter To Get Anwser\n";//prints text then goes down one with \n
                cin>>num2;//2nd number
                cout<<"\n";//new line
                cout<<num + num2;//adds both numbers together
                cout<<"\n";//new line
                break;//ends
           case '2'://subtraction case
                cout<<"\n";//new line
                cout<<"Enter Your Number You Want To Be Subtracted, Then Hit Enter\n";//prints text then goes down one with \n
                cin>>num;//1st number 
                cout<<"\n";//new line
                cout<<"Enter Another Number To Get Subtracted With It, Then Hit Enter To Get Anwser\n";//prints text then goes down one with \n
                cin>>num2;//2st number 
                cout<<"\n";//new line
                cout<<num - num2;//substracts both numbers
                cout<<"\n";//new line
                break;//ends
           case '3'://divid case 3
                cout<<"\n";//new line
                cout<<"Enter Your Number You Want To Be Divided, Then Hit Enter\n";//prints text then goes down one with \n
                cin>>num;//1st number 
                cout<<"\n";//new line
                cout<<"Enter Another Number To Get Divided With It, Then Hit Enter To Get Anwser\n";//prints text then goes down one with \n
                cin>>num2;//2st number 
                cout<<"\n";//new line
                cout<<num / num2;//divides both numbers
                cout<<"\n";//new line
                break;//ends
           case '4'://multiply case 4
                cout<<"\n";//new line
                cout<<"Enter Your Number You Want To Multiply, Then Hit Enter\n";//prints text then goes down one with \n
                cin>>num;//1st number 
                cout<<"\n";//new line
                cout<<"Enter Another Number To Get Multiplied With It, Then Hit Enter To Get Anwser\n";//prints text then goes down one with \n
                cin>>num2;//2nd number
                cout<<"\n";//new line
                cout<<num * num2;//multiples both numbers
                cout<<"\n";//new line
                break;//ends
           case '5'://info for case 5
                cout<<"\n";//new line
                cout<<"\n";//new line
                cout<<"My First Calculater In C++ Nothing Special\n";//prints text then goes down one with \n
                cout<<"Make Sure To Use It Eveytime You Have Math Homework :)\n";//prints text then goes down one with \n
                cout<<"\n";//new line
                cout<<"\n";//new line
                cout<<"\n";//new line
                break;//ends
           default://this will show up if u hit wrong button
                   cout<<"Not A Real Function, You Fail At Life :) ~BK";
                   cout<<"\n";//new line
                   cout<<"\n";//new line
                }
}
return 0;
}