Digital Dice Practice Code

main.dart

import 'dart:math';

import 'dart:io';


main(List<String> arguments) {
  print("This is a digital dice program. Press enter to roll!");
  print("Enter Q or q to quit.");

  int numOfDieToRoll;
  do {
    if (numOfDieToRoll != null || numOfDieToRoll == 0) {
      print("Sorry, please only enter numbers.");
    }

    print("How many dice would you like to roll?");

    try {
      numOfDieToRoll = int.parse(stdin.readLineSync());
    } catch (Error) {
      numOfDieToRoll = 0;
      continue;
    }
  } while (numOfDieToRoll is! int || numOfDieToRoll == 0);

  print("Rolling $numOfDieToRoll dice.");
  String input;

  do {
    print("Press Enter when ready.");
    input = stdin.readLineSync();
    var diceRoll = gen_random(numOfDieToRoll);

    int sum = 0;
    diceRoll.forEach((die) {
      sum += die;
    });
    for (int i = 0; i < diceRoll.length; i++) {
      print("Die ${i + 1}: ${diceRoll[i]}");
    }
    print("That totals $sum!");
  } while (input.toLowerCase() != "q");

  print("Thanks for playing!");
}

List<int> gen_random([int numOfRandomIntsToGen]) {
  if (numOfRandomIntsToGen == null) numOfRandomIntsToGen = 2; // default value
  List<int> numbers = [];
  var rGen = new Random(); // this is how you make a random number generator
  int rand;
  for (int i = 0; i < numOfRandomIntsToGen; i++) {
    // looping through the number of "Dice" to roll
    do {
      rand = rGen.nextInt(7); // generating the random number
    } while (rand ==
        0); // this is to check to make sure we didn't get 0, since that's not a valid die roll.
    numbers.add(rand);
  }
  return numbers;
}