CHALLENGE 5 / 20SEP - 25SEP / Mastermind (Fallout's Hacking Game)

main.cpp

#include <iostream>
#include <string>
#include <fstream>
#include <vector>
#include <stdlib.h>
#include <time.h>

using namespace std;

string toupperstring(string s) //function for making all letters in a string uppercase.
{
    for(int i = 0; i<s.length(); i++)
    {
        s[i] = toupper(s[i]);
    }
    return s;
}

int main(int argc, char* argv[])
{
    bool easy = false;

    if (argc > 1)
    {
        if (string(argv[1]) == "-easy") easy = true; //sets easy to true when you type "-easy" as an argument in the console.
    }

    vector<string> passwords;
    ifstream file ("words.txt");
    if (file.is_open())
    {
        string passwordFromFile;
        while (file >> passwordFromFile)
        {
            passwords.push_back(passwordFromFile); //put all passwords in a vector.
        }

        if (passwords.size() == 0)
        {
            cout << "The file \"words.txt\" is empty or only contains whitespace characters.";
            return 1;
        }

        srand(time(NULL)); //use time as seed
        string password = passwords[rand() % passwords.size()]; //pick a password.
        //alternative method: string password = passwords[(int) (passwords.size() * (rand() / (RAND_MAX + 1.0)))];

        int maxTries = password.length(); //sets max tries to password length.
        int tries;
        for (tries = 0; tries < maxTries; tries++)
        {
            string input;
            if (tries == 0) cout << "Guess password: "; else cout << "You have " << maxTries - tries << " tries left. Guess password: "; //tells user to guess the password and shows how many tries they have left.
            getline(cin, input); //get user input.

            if (toupperstring(input) == toupperstring(password)) //check if input is equal to password (not case sensitive).
            {
                cout << "You won! You guessed the password!" << endl;
                return 0;
            }
            else
            {
                if (!input.empty()) //this will stop the program from freezing when input is empty.
                {
                    int correctPositions = 0;
                    if (password.length() >= input.length())
                    {
                        for (int i = 0; i < password.length(); i++)
                        {
                            if (i < input.length())
                            {
                                if (toupper(password[i]) == toupper(input[i]))
                                {
                                    if (easy == true) cout << (char) toupper(password[i]) << " ";
                                    correctPositions++;
                                }
                                else
                                {
                                    if (easy == true) cout << "_ ";
                                }
                            }
                            else
                            {
                                if (easy == true) cout << "- ";
                            }
                        }
                        if (easy == true) cout << "(";
                        cout << correctPositions << "/" << password.length();
                        if (easy == true) cout << ")";
                        cout << endl;
                    }
                    else
                    {
                        for (int i = 0; i < input.length(); i++)
                        {
                            if (i < password.length())
                            {
                                if (toupper(password[i]) == toupper(input[i]))
                                {
                                    if (easy == true) cout << (char) toupper(password[i]) << " ";
                                    correctPositions++;
                                }
                                else
                                {
                                    if (easy == true) cout << "_ ";
                                }
                            }
                            else
                            {
                                if (easy == true) cout << ". ";
                            }
                        }
                        if (easy == true) cout << "(";
                        cout << correctPositions << "/" << password.length();
                        if (easy == true) cout << ")";
                        cout << endl;
                    }
                }
            }
        }
        if (tries == maxTries) cout << "You lost! The password was: " << toupperstring(password);
    }
    else
    {
        cout << "Unable to open file. Make sure the file is called \"words.txt\".";
        return 1;
    }
    return 0;
}