Question

Write a C++ program that checks if the password is correct. The password is a 4-digit number combination. The program repeats to ask the password until the password is correct or you enter -1 to exit.

Input: The password is set to ‘1123’. A user input the password to proceed, or -1 to exit.

Sample Output: The program should display the following output. (The red text is a user input.)

Test case 1: when you enter the correct password.

Enter the password (or -1 to exit): 1234

Password is incorrect.

Enter the password (or -1 to exit): 1123

Password is correct. Test case 2: when you exit the program.

Enter the password (or -1 to exit): -1

You exit the program.

Answer 1

/* C++ program that checks if the password is correct.

The program repeats to ask the password until the password is correct or the user enter -1 to exit. */

#include <iostream>

using namespace std;

int main()

{

       int password = 1123; // correct password

       int user_password;

       // input of user password

       cout<<"Enter the password (or -1 to exit): ";

       cin>>user_password;

       // loop continues till user exits

       while(user_password != -1)

       {

             // check if password is correct, print success message and then exit from loop

             if(password == user_password)

             {

                    cout<<"Password is correct"<<endl;

                    break;

             }else // print failure message

                    cout<<"Password is incorrect."<<endl;

             // input of password

             cout<<"Enter the password (or -1 to exit): ";

             cin>>user_password;

       }

       // check if user exited the program

       if(user_password == -1)

             cout<<"You exit the program."<<endl;

               return 0;

}

//end of program

Output: