This short source code will show you how to make a password protected program using a while loop. If you have any questions or comments, post them here.

Source Code:
#include <iostream.h>

#include <string.h>

using namespace std;



int main()

{

    string pass;  //this is what ever you set your password to

    

    cout<<"This program is password protected. Enter the password: ";

    cin>>pass;

    while(pass!="qwerty123") //sets a loop, so while they don't put the password in as qwerty123 (or whatever you set yours to)

    {                            //then the program wont start, it will just give an error message.

         cout<<"That is not the password, the program will not start until you get the password right."<<endl;

         cout<<"Try again: ";

         cin>>pass;

    }

    

    cout<<"Access Granted, program will now start."<<endl;

    

    // the rest of your program would go BELOW this while loop. Make sure it's after the while loop.

    // the while loop is basically outputting the message until the condition is broken.

    // if you had your program before the loop, it would still go through and not see the while loop until after the program.

    

    //That's how you make a password protected program using a while loop.

    

    system ("PAUSE");

    return 0;



}