Guess the number game.

I am still a beginner and I need to use only those operators that are in the code, I am forbidden to use something else. The program gives the user 3 attempts to guess the number, but if the user goes out of range and writes for example -1 or 11, then the program should give the word "error" and should not consider this as an attempt.

I understand that you need to use a "for" loop,

    int a;
    int b = 0;
    for (a = 1; a < 11; a  )
    {
        b = b   a;
    }
    Console.WriteLine(b);

but I can not implement my idea. I will be grateful if you help!

         int a;
         int aa;
         a = 5;
         Console.WriteLine("Guess my number from 1 to 10");
         aa = Convert.ToInt32(Console.ReadLine());

         int b;

         for (b = 0; b < 2; b  )
         {
             if (aa == a)
             {
                 Console.WriteLine("Guessed");
             }
             else if (aa < a)
             {
                 Console.WriteLine("more");
                 aa = Convert.ToInt32(Console.ReadLine());
             }


             else
             {
                if (aa > 10)
                {

                    for ()
                    {
                     
                        Console.WriteLine("error");
                        aa = Convert.ToInt32(Console.ReadLine());
                    }

                }
                else if (aa < 1)
                 {
                     Console.WriteLine("error");
                     aa = Convert.ToInt32(Console.ReadLine());
                 }
                 else
                 {
                     Console.WriteLine("less");
                     aa = Convert.ToInt32(Console.ReadLine());
                 }
             }
         }

CodePudding user response：

Written on mobile, but this should work.

  int a;
     int aa;
     a = 5;

     for (int b = 0; b < 2; b  )
     {

         Console.WriteLine("Guess my number from 1 to 10");
          aa = Convert.ToInt32(Console.ReadLine());

         if(aa>10 ||aa<=0){
            Console.WriteLine("error");
          b--;
             continue;
        } 
         if (aa == a)
         {
             Console.WriteLine("Guessed");
              break;
         }
         else if (aa < a)
         {
             Console.WriteLine("more");
         }
            else {
                 Console.WriteLine("less");
             }
         }
     }

CodePudding user response：

I have made a game like that for you.

        const int number = 5;
        const int attempts = 3;

        for (var i = 1; i <= attempts; i  )
        {
            Console.WriteLine($"Attempt number: {i}/{attempts}");

            Console.WriteLine("Guess my number from 1 to 10");

            if (!int.TryParse(Console.ReadLine(), out var guessedNumber))
            {
                Console.WriteLine("Wrong Format!");
                i--;
                continue;
            }

            if (number == guessedNumber)
            {
                Console.WriteLine("Guessed");
                break;
            }

            if (guessedNumber > 10 || guessedNumber < 1)
            {
                Console.WriteLine("Error!");
                i--;
            }

            if (i != attempts)
            {
                Console.WriteLine("Try again");
                Console.WriteLine("*****************************");
            }
            else
                Console.WriteLine("Failed");
        }
        Console.ReadLine(); //use for program wait there.

CodePudding user response：

I think your main problem is getting the user input. You should take it to its own method:

private static int GetUserInput()
{
    while(true) // could also be `for(;;)` if you are not allowed to use `while`
    {
        Console.WriteLine("Enter a number from 0 to 10:");
        if(int.TryParse(Console.ReadLine(), out int userInput))
        {
           if( userInput >= 0 && userInput <= 10 )
           {
                return userInput;
           }
        }
        
        Console.WriteLine("error.");
    }
}

Now you can be sure to get a valid guess and concentrate on the main game flow.

CodePudding user response：

There's no need for multiple for loops, you just need one, the main "attempt loop". Let's break it down to the fundamental steps of the program:

1. Get user input
2. "Bounds check" the input
3. Check if the user guessed correctly or not
4. Repeat if incorrect guess

And we want to repeat a maximum of 3 times.

Using that we can start to program:

Step 1: Taking user input

Console.WriteLine("Guess the number (0-10):")
string guessInput = Console.ReadLine();
int guess = Convert.ToInt(guessInput);

Step 2: Bounds checking:

// Read: "If guess is smaller than 0, or guess is greater than 10
if (guess < 0 || guess > 10)
{
    Console.WriteLine("error");
    guesses--;
}

Step 3: Checking if the guess is correct or not:

if (guess == target)
{
    Console.WriteLine("success");
}

Step 4: Repeat

int target = 5;
for (int guesses = 0; guesses < 3; i  )
{
    // Code from steps 1 to 3 goes here
}

Putting it all together:

(Spoiler warning! If you want to solve it yourself using the knowledge above then stop reading

int target = 5;
for (int guesses = 0; guesses < 3; i  )
{
    Console.WriteLine("Guess the number (0-10):");
    string guessInput = Console.ReadLine();
    int guess = Convert.ToInt(guessInput);

    if (guess < 0 || guess > 10)
    {
        Console.WriteLine("error");
        // Invalid input, so we're subtracting 1 from the total guesses
        guesses--;
    }

    if (guess == target)
    {
        Console.WriteLine("Guessed");
        // Congrats, now we want to stop the loop.
        // We do this by invalidating the condition, i.e making 'guesses < 3' false
        guesses = 10; // Any number larger than 3
    }

    if (guess > target)
    {
        Console.WriteLine("more");
    }
    else if (guess < target)
    {
        Console.WriteLine("less");
    }
}