Listed below are snippets from a program to perform input validation for

a username and password. The code to input and validate the username is

in a separate file than the code to input and validate the password.

Partial code from user.cpp:

namespace Authenticate

{

void inputUserName()

{

do

{

cout << "Enter your username (8 letters only)" << endl;

cin >> username;

} while (!isValid());

}

string getUserName()

{

return username;

}

}

Define the username variable and the isValid() function in the

unnamed namespace so the code will compile. The isValid() function

should return true if username contains exactly eight letters. Generate an

appropriate header file for this code.

Repeat the same steps for the file password.cpp, placing the password

variable and the isValid() function in the unnamed namespace:

namespace Authenticate

{

void inputPassword()

{

do

{

cout << "Enter your password (at least 8 characters " <<

"and at least one non-letter)" << endl;

cin >> password ;

} while (!isValid());

}

string getPassword()

{

return password;

}

}

For passwords, isValid() should require the password to have eight or

more letters and at least one non-letter. Generate an appropriate header

file for this code as well. (continued)

At this point, you should have two functions named isValid(), each in

different unnamed namespaces. Place the following main function in an

appropriate place. The program should compile and run.

int main()

{

inputUserName();

inputPassword();

cout << "Your username is " << getUserName() <<

"and your password is: " <<

getPassword() << endl;

return 0;

}