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// Mastermind Game
// Programmer: Edward Chen
// CMPSC 121
// Date: 10/08/2013
#include <iostream> // belongs to the beginning of every program
#include <math.h> // header
#include <ctime>
using namespace std;
void playMastermind() // play Mastermind function for the whole game
{
int rollDie ( int sides ); // declaring the functions used
void evaluate ( int answer, int combo );
bool play = true; // bool setting play to true
while ( play == true ) // resets while loop if play is equal to true
{
int digitOne; // initialize digit variables
int digitTwo;
int digitThree;
int digitFour;
digitOne = rollDie (6); // finding random values for the digits by calling the rollDie function
digitTwo = rollDie (6);
digitThree = rollDie (6);
digitFour = rollDie (6);
digitOne *= 1000; // finding the actual number with the digits combined
digitTwo *= 100;
digitThree *= 10;
digitFour *= 1;
int correct; // initializing the correct answer that the computer decides on
correct = digitOne + digitTwo + digitThree + digitFour; // the correct answer
int combo; // initializing the variable that the player guesses
int tries = 0; // initializing the number of tries to 0
bool answer = false; // bool for when the answer is false
while ( tries < 12 && answer == false ) // while loop asking for the player to guess a number
{
cout << "Please enter your 4-digit guess: " << endl; // asking the user to input his/her guess
cin >> combo; // storing the guess as combo
tries++; // adding up the tries for each time
evaluate ( correct, combo ); // letting people know how many pegs they got
}
if ( tries >= 12 ) // if-statement for when the user reaches his limit of tries
{
cout << "Sorry! You did not guess my number." << endl; // telling the user he is done
cout << "The number was " << correct << endl; // letting the user know the number
}
cout << "Play another game? (y/n)"; // asking the user if he/she wants to play again
char reply; // initializing the reply
cin >> reply; // storing the input
if ( reply == 'y' || reply == 'Y' ) // if-statement for when the user replies with a yes
{
play = true; // keeps the bool set to true
}
else // if anything else is input
{
play = false; // sets the bool to false so that the while loop does not repeat
}
}
}
int rollDie ( int sides ) // rollDie function to calculate the random digits
{
srand(time(NULL));
int randNum; // initializing the random numbers
randNum = 1 + rand() % sides; // calling a random number between 1 and 6
return randNum; // returning the value
}
int nthDigit ( int combo, int position ) // nthDigit function to find the digits in their respective positions
{
int digit; // initializing the digit variable
digit = ( combo ) / ( pow( 10, 4 - position )); // finding the digit based on the position
int value; // initializing the value variable
value = digit % 10; // finding the actual value of the digit
return value; // returning the value
}
void evaluate ( int answer, int combo ) // evaluate function to determine the number of correct digits guessed
{
int nthDigit ( int combo, int position ); // declaring the function to be used
int clearNthDigit ( int combo, int position );
int digitOne; // initializing variables for the digits
int digitTwo;
int digitThree;
int digitFour;
int pegsBlack = 0; // initializing the different colored pegs
int pegsWhite = 0;
digitOne = answer / ( pow( 10, 3 )); // finding each respective digit
digitOne = digitOne % 10;
digitTwo = answer / ( pow( 10, 2 ));
digitTwo = digitTwo % 10;
digitThree = answer / ( pow( 10, 1 ));
digitThree = digitThree % 10;
digitFour = answer / ( pow( 10, 0 ));
digitFour = digitFour % 10;
int i = 1; // initializing the counter
while ( i <= 4 ) // while statement acting until i is equal to 4
{
if ( nthDigit ( combo, i ) == nthDigit ( answer, i ) ) // if the one digit of the combo is equal to that of the answer
{
pegsBlack++; // add one black peg
clearNthDigit ( answer, i ); // function used to clear the digits that are correct
// clearNthDigit ( combo, i );
}
i++; // adds 1 to i each loop
}
int j = 1; // initializing variable
int k = 1;
while ( j < 4 ) // while-statement for the white pegs
{
while ( k <= 4 )
{
k++;
if ( nthDigit ( combo, j ) == nthDigit ( answer, k ))
{
pegsWhite++;
clearNthDigit ( answer, k );
}
}
j++;
}
/*
if ( nthDigit ( combo, 1 ) == digitTwo ) // otherwise giving white peg if in different position
{
pegsWhite++;
}
if ( nthDigit ( combo, 1 ) == digitThree )
{
pegsWhite++;
}
if ( nthDigit ( combo, 1 ) == digitFour )
{
pegsWhite++;
}
if ( nthDigit ( combo, 2 ) == digitOne )
{
pegsWhite++;
}
if ( nthDigit ( combo, 2 ) == digitThree )
{
pegsWhite++;
}
if ( nthDigit ( combo, 2 ) == digitFour )
{
pegsWhite++;
}
if ( nthDigit ( combo, 3 ) == digitOne )
{
pegsWhite++;
}
if ( nthDigit ( combo, 3 ) == digitTwo )
{
pegsWhite++;
}
if ( nthDigit ( combo, 3 ) == digitFour )
{
pegsWhite++;
}
if ( nthDigit ( combo, 4 ) == digitOne )
{
pegsWhite++;
}
if ( nthDigit ( combo, 4 ) == digitTwo )
{
pegsWhite++;
}
if ( nthDigit ( combo, 4 ) == digitThree )
{
pegsWhite++;
} */
cout << "You have earned " << pegsBlack << " black pegs and " << pegsWhite << " white pegs." << endl; // letting the user his number of pegs
if ( pegsBlack == 4 ) // if-statement for when the user reached 4 black pegs
{
cout << "Congratulations! You have guessed the correct combination!" << endl; // stating that he/she then wins
}
}
int clearNthDigit ( int combo, int position ) // clearNthDigit function to change the digit to 0
{
int nthDigit ( int combo, int position ); // declaring the function to be used
int value; // initializing the variable
value = nthDigit ( combo, position ) * ( pow ( 10, 4 - position ) ); // finding the value of the digit and then multiplying that by its position value
int zero; // initializing variable
zero = combo - value; // subtracting the previous value to "zero" that digit
return zero; // return the value
}
int main() // main function that runs the program
{
cout << "Welcome to Mastermind!" << endl; // introduction of the program
cout << "The computer will choose a 4-digit number." << endl;
cout << "Your objective is to guess that number!" << endl;
cout << "If you get one digit correct, but in the wrong position ... " << endl;
cout << "You will be given a white peg." << endl;
cout << "If you get one digit correct, and in the correct position ... " << endl;
cout << "You will be given a black peg." << endl;
playMastermind(); // function that actually starts the mastermind game
return 0; // ends the program
}
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