Thread: What's wrong with my integers?

Hello, I just started using Java last week. And I've decided to try to make my own guessing game without looking up a tutorial on how to do so. My problem is that, it's saying my ints cannot be resolved as variables. So here is my code!

import java.util.Scanner;
 
 
public class StringVariables {
 
	public static void main(String [] args) {
		int answer1 = your_first_guess;
		int answer2 = your_second_guess;
		int answer3 = your_last_guess;
 
		Scanner user_input = new Scanner(System.in);
 
		String your_first_guess;
		System.out.println("You have three guesses left");
		System.out.println("Please enter your first guess!");
		your_first_guess = user_input.next();
			if (answer1 != Math.random()){
				System.out.println("You are wrong!");
			}else{
				System.out.println("You are rigtht!");}
 
		String your_second_guess;
		System.out.println("You have two guesses left!");
		System.out.println("Please enter your second guess!");
		your_second_guess = user_input.next();
 
 
		String your_last_guess;
		System.out.println("You have one guess left!");
		System.out.println("Please enter your last guess!");
		your_last_guess = user_input.next();
 
	}
 
}

Thank you for your help.

P.S. Please don't point out any other mistakes I would like to find them myself!

Your program code is initiated sequentially, line by line. So what do you think happens when your IDE runs your the first statement in the main method of the code.

//You are declaring these integer elements and then assigning them values from variables that have not been defined/initialized.
 
int answer1 = your_first_guess;      //Variable answer1(initalized to 0 depending on your IDE) *gets*
                                    //variable your_first_guess (No type has been defined and has not been initalized)
int answer2 = your_second_guess;  
int answer3 = your_last_guess;

Originally Posted by markch25

Well I don't exactly have a value for the integers. So how would I make the integers the numbers the person guesses?

Goal 1: I want to get the user's guess.
Tip: Using I/O, get the users guess and store it inside an integer variable.

Goal 2: I want to get a random number.
Tip: Using the random class, using the method MATH.random() will generate a random number.

Goal 3: I want to store that random number.
Tip: Store it in the appropriate data type variable.

Goal 4: Compare the users guess with the random number.
Tip: Using an equality operator you can compare the two, then using a loop statement
such as a do while loop, you can continue the game.


Contact: JavaCottage@skype.com if you need any assistance as well.

Originally Posted by AlexHail

...Also when using Math.random(), this method returns a double value from 0.0 to 1.0 and I don't think its what you're looking for

With a little bit a manipulation it's a perfect method for this problem.

Just remember that when using Math.random() from the java.lang.Math class is that it returns a static double value. So remember when comparing or casting a double to an int precision will be lost.

Java API:

Returns a double value with a positive sign, greater than or equal to 0.0 and less than 1.0.

But let's say you wanted a random integer between 1 and 100. Well since the method returns a value LESS than 1.0 you'll have to do three things. Multiple the return by 100, add by 1, and convert to int.

int rnd = (int)(100 * Math.random() + 1);

Why not just use nextInt in the Random class?