Thread: Almost Giving up :((

If you have code you are having problems with, please post it with your questions.

I have not idea what you want the code to do or what the contents of your post means or how it is related to java programming.

Please Edit your post and wrap your code with[code=java]<YOUR CODE HERE>[/code] to get highlighting

Post the console contents for when you execute the program that shows the problem.

Hello, here's my code so far again...I am quite figuring it out but i am stuck in a line, hope you guys can figure it out whats wrong ;p . Thank you in advance
This one runs, I think you can figure it out what this for...
I have two codes here
(1)Running, to see what i want to do with this code
(2)Upgrading my code to next level i am stuck in a line @_@

RUNNING:It's proceeding to level 7 but i don't think it's the correct way...

import java.util.*;
import java.io.*;
 
public class Proj6
{
	public static DataInputStream input=new DataInputStream(System.in);
	public static void main(String args[])throws Exception
	{
		int input2;
		System.out.println("Level 6");
		do
		{
		System.out.println("**********************\n(1)-INCREASE  (2)-EXIT");
		System.out.print("Input: ");
		input2=Integer.parseInt(input.readLine());
 
		int level=6;
		Random r = new Random();
		int rand = r.nextInt(100);
 
		if(rand<51)
		level=level+1;
		else if (rand>50)
		{
			Random r2 = new Random();
			int rand2 = r.nextInt(100);
			if(rand2<51)
				System.out.println("FAILED");
				else
					System.out.println("GAME OVER");
		}
		if(level==7)
		{
			System.out.println("Level 7");
		}
		}
		while (input2==1);
		System.out.println("****END OF PROGRAM****");
 
	}
}

STUCK:I think this will work but i am stuck in a line...Forgot how to get value from a statement...

import java.util.*;
import java.io.*;
 
public class Project7
{
	public static DataInputStream input=new DataInputStream(System.in);
	public static void main(String args[])throws Exception
	{
		//int value; if i initialize value here i think its fix and cannot be change.
		int input2;
		System.out.println("Level 6");
		do
		{
		System.out.println("**********************\n(1)-INCREASE  (2)-EXIT");
		System.out.print("Input: ");
		input2=Integer.parseInt(input.readLine());
 
		Random r = new Random();
		int rand = r.nextInt(100);
 
		if(rand<51)
		int level=level+1; //here it changes but its value cannot be detected outsite the statement...
		else if (rand>50)
		{
			Random r2 = new Random();
			int rand2 = r.nextInt(100);
			if(rand2<51)
				System.out.println("FAILED");
				else
					System.out.println("GAME OVER");
		}
		}//This while is to keep doing this statement as long Level is not increased...
		while ((input2==1)||(level==6));//****I have problem in this line, how to proceed to level 7 if value is increased?
		if(level==7)
		{
			System.out.println("Level 7"); //I made it short but i want it simultanious until Level 12 and so on...
		}
		System.out.println("****END OF PROGRAM****");
	}
}

Sorry, the truth is my programming skill is very limited now i am using more on logic to make this work...
Thank you guys...

i am stuck in a line @_@

I can not find a line that is marked with @_@.

Can you explain what you are stuck on?

On the SECOND code...
On my while condition...value of level thing, cant figure out how i can get value of level in do {statement}...

I forgot how to get value inside the do{statement}

You need to define the level variable at the same scope (within the same pair of {}s) for all the places that you want to access it.

Sorry, I do not understand what you are asking.

Please copy and paste here the full text of the error messages you are getting.

Still in grip of this one
It's posible to implement IF/IF ELSE statement within DO statement right?
But i cant figure out how...

import java.io.*;
import java.util.*;
public class Project12
{
	public static DataInputStream input=new DataInputStream(System.in);
	public static void main(String[]args)throws Exception
	{
		int level=getLevel();
		while(level==1)
			getLevel();
			System.out.println("Level 2");
 
	}
	public static int getLevel()throws Exception
	{
		int  input1;
		System.out.print("Input: ");
		input1=Integer.parseInt(input.readLine());
 
		Random r=new Random();
		int rand=r.nextInt(100);
		if(rand<51)
		{
			int level1=2;
			return level1;
		}
			else if (rand>=51)
			{
				int level1=1;
				return level1;
			}
			//It says return statement should be in this line.
                        //Is it posible to have 2 choices which to be return?
	}
}

Yes, an if statement can be inside of a do/while statement.

do {
   if(condition) {
     // do this if true
   }else{
     // do this if false
    }
   // do this stuff always
}while(more condtiions);

import java.io.*;
import java.util.*;
public class Project12
{
	public static DataInputStream input=new DataInputStream(System.in);
	public static void main(String[]args)throws Exception
	{
		int level=getLevel();
		while(level==1)
			getLevel();
			System.out.println("Level 2");
 
	}
	public static int getLevel()throws Exception
	{
 
		Random r=new Random();
		int rand=r.nextInt(100);
		if(rand<51)
		{
			int  input1;
			System.out.print("Input: ");
			input1=Integer.parseInt(input.readLine());
			int level1=2;
			return level1;
		}
			else if (rand>=51)
			{
				int  input1;
				System.out.print("Input: ");
				input1=Integer.parseInt(input.readLine());
				int level1=1;
				return level1;
			}
			//It says return statement should be in this line.
	}
}

I tried what you posted, but i can manage to make it working...
I have i problem where to initialize the variable level and where to put return statement

Where should i put variable level and where to initialize it, and how can i return the value inside the IF or ELSE IF...

Please post the full text of any error messages you get.

where to initialize the variable level and where to put return statement

The variable: level is defined in the main() method which is defined as void and does not return anything.

You need to have a return statement outside of the if / else statements because the compiler requires the method to always return something and can not evaluate the logic to know what it could do. It wants to be sure something is returned.

Have diff problem ;p

public int getValue()
{
 
if(condition)
return 1;
 
else if(condition)
return 2;
 
//it says return statement should be int this line :(
 
}

You don't need to define a variable. You can do it this way:

   int value2=2;
   return value2;
vs 
   return 2;    // return the 2 without using a variable

Originally Posted by amakuzaki

Still in grip of this one...

	public static void main(String[]args)throws Exception
	{
		int level=getLevel();
		while(level==1)
			getLevel();
			System.out.println("Level 2");
 
	}

I am new here, and I am having a problem understanding the intent in your main() function.

I reformatted your code slightly, and I added a couple of comments to what I think your code is doing. Is this what you meant for it to do?

    public static void main(String[]args)throws Exception
    {
        int level = getLevel(); // Call the function and assign return value to the variable "level"
        /*
           Will enter the loop if (and only if) getLevel() returned 1
           Once it is in the loop, it will not leave until the value
           of the "level" variable changes to something else.
        */
        while(level == 1)
        { 
            getLevel(); // Call the function but ignore the return value
        }
        System.out.println("Level not equal to 1 any more.");
    }

If my comments do not reflect your intent, maybe you can tell us (in a natural language, not Java) what you had in mind for this program.


Cheers!

Z

Originally Posted by amakuzaki

.
.
.
	public static int getLevel()throws Exception
	{
 
		Random r=new Random();
		int rand=r.nextInt(100);
		if(rand<51)
		{
.
. // Some stuff
.			return level1;
		}
			else if (rand>=51)
			{
.
. // Some stuff
.
				return level1;
			}
			//It says return statement should be in this line.
	}
}

how can i return the value inside the IF or ELSE IF...

Hmmm...Perhaps you over-engineered it. Sometimes less is more. (Extra tests sometimes get in the way of compiler semantics) Sometimes compilers seem to be smarter than us, but, there are rather rigid rules for the compilers.

Why not try something like the following?

    public static int getLevel() throws Exception
    {
.
.
.
        int rand = r.nextInt(100);
        System.out.println("rand = " + rand); // (Optional: For debugging)
        if(rand < 51)
        {
.
.  // Some stuff
. 
           return level1;
        }
        /* Hmmm... if the integer value is not less than 51, it
         * must be greater than or equal to 51, right?
         * So why confuse the compiler (as well as us mere
         * humans) with a superfluous if?
         */
        else //if (rand>=51) <--- just "else" here, not "else if"
        {
.
.  // Some stuff
.  
          return level1;
        }
    }
}

Cheers!

Z

That is an assignment statement. The expression to the right of the = is evaluated and its value is assigned to the variable to the left of the =


This may be wrong. I missed seeing the int. Another reason to post code inside of code wrappers.