all code

#include <iostream>
#include <cstdlib>
using namespace std;


/*int RandNum(int firstNum, int secondNum, int thirdNum) {
  int initialRandInt = rand() % 10;

  firstNum = initialRandInt;
  secondNum = initialRandInt;
  thirdNum = initialRandInt;

  while ( secondNum == firstNum ) {
    secondNum = rand() % 10;
  }
  while ( thirdNum == firstNum || thirdNum == secondNum ) {
    thirdNum = rand() % 10;
  }
  return firstNum, secondNum, thirdNum;
}*/


int main()
{
	// Display game information and rules //
	cout << "Program: 2 MasterMind" << endl;
  cout << "The program selects 3 distinct random digits 0..9." << endl;
  cout << "On each turn you guess 3 digits.  Program indicates how many are correct." << endl;
  cout << "You have 10 moves to guess the number.  "
       << "Good luck!" << endl << endl;

  // setting the 3 digits with 's' or randomizing with 'r'
  cout << "Press 's' to set the three digits, or 'r' to randomize them:" << endl;
  char userInput = ' ';
  cin >> userInput;

  // setting the value of each number
  int firstNum;
  int secondNum;
  int thirdNum;

  if ( userInput == 's') {
    cin >> firstNum >> secondNum >> thirdNum;
  }
  else if ( userInput == 'r') {
    int initialRandInt = rand() % 10;

    firstNum = initialRandInt;
    secondNum = initialRandInt;
    thirdNum = initialRandInt;
  }
    while ( secondNum == firstNum ) {
      secondNum = rand() % 10;
    }
    while ( thirdNum == firstNum || thirdNum == secondNum ) {
      thirdNum = rand() % 10;
  }

  cout << "Values to guess are: " << firstNum << secondNum << thirdNum;
  cout << endl << endl << "Exiting...";



	return 0;
}