parthfinal.dart

import 'dart:math';
import 'dart:io';

add (int first,int second,int playeranswer)
{
  if (first + second == playeranswer)
  {
    print ("you got it!");
  }
  if (first + second != playeranswer)
  {
    print ("Better Luck next time!");
  }
}
subtract (int first,int second, int playeranswer)
{
  if (first - second == playeranswer)
  {
    print ("you got it!");
  }
  
  if (first - second != playeranswer)
  {
    print ("Better Luck next time!");
  }
}

multiply (int first,int second,int playeranswer)
{
  if (first * second == playeranswer)
  {
    print ("you got it!");
  }
  if (first * second != playeranswer)
  {
    print ("Better Luck next time!");
  }
}
divide (int first,int second,int playeranswer)
{
  if (first/second == playeranswer)
  {
    print ("you got it!");
  }
  if (first/second != playeranswer)
  {
    print ("Better Luck next time!");
  }
}

main ()
{
  print ("please enter + or - or * or /");
  var playeroperation = stdin.readLineSync ();
  print ("please enter easy or medium or hard level");
  var level = stdin.readLineSync();
  
  Random r = Random ();
  
  var first;
  var second;
  
  if (level == "easy")
  {
      first = r.nextInt (1500);
      second = r.nextInt (1000);
  }
  
  if (level == "medium")
  {
     first = r.nextInt (15000);
      second = r.nextInt (10000);
  }
  
   if (level == "hard")
  {
     first = r.nextInt (150000);
     second = r.nextInt (100000);
  }
  
  print (playeroperation);
  print (first);
  print (second);
  
  var playeranswer = int.parse(stdin.readLineSync ());

  if (playeroperation == "+")
  {
    add (first,second,playeranswer);
  }
  
  if (playeroperation == "-")
  {
    subtract (first,second,playeranswer);
  }
  
  if (playeroperation == "*")
  {
    multiply (first,second,playeranswer);
  }
  
  if (playeroperation == "/")
  {
    divide (first,second,playeranswer);
  }
  
  
}