Hey guys, I just started on the road to learning C++. I am working through the book Jumping into C++, but am stuck on a problem. In chapter 4, where if-statements are introduced, there is a question which asks:Expand the password checking program from earlier in this chapter and make it take multiple usernames, each with their own password, and ensure that the right username is used for the right password. Provide the ability to prompt users again if the first login attempt failed. Think about how easy (or hard) it is to do this for a lot of usernames and passwords.
The password checking program given is:
Code:
#include <iostream>
#include <string>
using namespace std;
int main ()
{
string username;
string password;
cout << "Enter your username: " << "\n";
getline( cin, username, '\n' );
cout << "Enter your password: " << "\n";
getline( cin, password, '\n' );
if ( username == "root" && password == "xyzzy" )
{
cout << "Access allowed" << "\n";
}
else
{
cout << "Bad username or password. Denied access!" << "\n";
return 0;
}
}
I understand how the given program works, and understand how I can make it check against other usernames by adding else-if statements. However, I do not understand how to make it prompt users again. I have a little bit of programming experience with Python, and it seems to me that I should run the entire program inside of a while-loop. However, the only concepts that have been covered thus far are variable types and assignment, if/else-if/else statements, arithmetic operations and boolean logic. Loops actually begin in the next chapter. Is there any way to prompt users again without using loops and using only those concepts that I listed? I realize that someone has asked this question here a few years ago, but all of the answers suggested using loops, and I was wondering if anyone knows how to do it with just the material presented thus far. Thanks!
Is a while loop needed here?
Originally Posted by jimblumberg
