[2d] Forum Topics

Dear all sir, i'm a begining of java and i have a problem to write the equation in java code , i want to make it in for loop and i also want to count it by column.how do i do? please me!!! example: f[1][1]=5.4; f[2][1]=5.0; f[3][1]=1.5; k[1][1]=|f[1][1]-f[2][1]|+|f[1][1]-f[3][1]-|; k[2][1]=|f[2][1]-f[1][1]|+|f[2][1]-f[3][1]-|; k[3][1]=|f[3][1]-f[1][1]|+|f[3][1]-f[2][1]-|;

I am trying to store the numbers of a text file into a 2D array.. Here's the text file: 1 2 3 2 3 4 4 5 6 But i get the error: Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2 at BankerAlg.main(BankerAlg.java:30) Process completed. Here's the code i made: [CODE] import …

Hi, I have a problem and forgive me if this sounds like a stupid question but I'm not really a good programmer. Ok, this is my problem. Say you have a string and you would like to pull out integers from the string what do you do? Example: String question …

I am having problem with converting and initializing errors. Any help is appreciated. I am a 2 yr Computer Science major, so be gentle. Here is Code: Sorry its long! [CODE]// Kyle Bennett // CS 318 // Paint Throwing Disturbance #include <iostream> #include <iomanip> // set width and decimal #include …

The output I expected was: [ICODE]alpha beta[/ICODE] I used the following code: [CODE]#include<iostream.h> #include<conio.h> void main() { clrscr(); char choice[2][5]={"alpha","beta"}; cout<<choice[0]<<endl; cout<<choice[1]; getch(); }[/CODE] But this is what comes: [ICODE]alphabeta beta[/ICODE] Can anyone tell me what I did wrong? Thank you. P.S.:I know I am not using standard c++, but …

I am trying to write a function that will count test scores that fall in a specific range(90-100, 89-80, 79-70, 69-60 and 60 or below) that are stored in a two dimensional array. Also, I am supposed to write a function that will do the same as above, only this …

Hi, Just wondering if anyone has any example of reading data from a file and storing it into an uneven 2D array. For example: the file contains [a,b,c] [a,b,c,d] [a,b,] etc I am able to do this with a complete "square" or matrix but when the columns aren't even I'm …

Hey Guys, I am a new student to Java and I am working on an assignment for school. I am not looking for anyone to do my work for me, just some guidance on what I can do to fix the problem. I have done research on this issue on …

Hi there, I am working with a 2D array, my c++ program reads input from an external file and stores it into a 2D array. Say, for example, this is my input file: 9 5 6 2 4 1 0 8 6 7 3 5 2 9 5 8 My …

hello programmers is it possible to extract some part of 2D array and make a new 1D array? for example from this array String[][] twoDarray= { {"s", "y", "r"}, {"s", "n", "r"}, {"w", "y", "r"}, {"r", "y", "p"}}; take first column of twoDarray[0] and make this `arrayString[] newArray = {"s","s","w","r"};` …

Hello all, I am currently a student doing an end-of-year software project - and I need some help. I am currently trying to return a 2D array from a function contained in a header file. The function is called from the main() and asks the user to input the location …

Hi everyone, I have a 2d array whith 50000 lines and 14 columns, and I have to sum/multiply each value of a column for a fixes numbers, like this: a[1][14] = 0 a[1][14] + 2 = 2 a[2][14] = 2 a[2][14] + 2 = 4 a[3][14] = 5 a[3][14] + …

i have this 2d array: String[][] testData= { {"s", "y", "r"}, {"s", "n", "r"}, {"w", "y", "r"}, {"s", "n", "r"} }; how can i count the occurrence of a particular element in the column of an array? for example i want to know how many "s" are in first column …

Hi forum, Could you give me some simple 2D array problems to solve? Thanks!

So I've been giving a number of assignments to do but I'm stuck on one in particular now. I've to create a 2D array ([5][2]) and then say how many times ou of the 5 rows that the first row was bigger than the second. I imagined I would need …

Hello, I am working on an assignment and I am so stuck and I have no clue how to get out. We are giving a maze and we are to find start and finish of the maze. The code is interpreted as giving the "walls" of the cell by looking …

Hello DaniWeb! I'm trying to return an array of strings from a function but I'm not sure how to do so. I've done the prerequisite Googling and have found people on this discussion board recommending to return char** which, it is said, can then be converted back into 2d array …

I've seen this problem a few times and I've tried what they've done. I am still not passing my Array correctly. I'm all templated up because of last files I have used for this program (Not in the code). If that could have something to do with it let me …

Hello Guys, I know how to draw line and shapes but how can i draw a parabol??? ( i need a 2D line) Any suggestion or pointers are appreciated!

when ever i try to compile/run my game in eclipse it says this [QUOTE]Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at OurGame.Board.checkCollisions(Board.java:78) at OurGame.Board.actionPerformed(Board.java:40) at javax.swing.Timer.fireActionPerformed(Unknown Source) at javax.swing.Timer$DoPostEvent.run(Unknown Source) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at …

The objective of this program is to create images or shapes by using 2day arrays. I've created the the maximum size in my constructor but my error is in the the rectangle method.This is my error: Hw11.java:60: cannot find symbol symbol : constructor Picture(char[][]) location: class Picture return new Picture(result); …

Hello guys, I'm currently working on a project that simulates a projectile motion. So far I'm preparing the flowchart of the program. I'm stuck when it comes to designing the path([B]2D Line[/B]) of the projectile Motion. So my question is, what fields,methods my class need in order to draw (in …

I was watching the java game tutorials by thenewboston on youtube but he stopped making them. Anyone know of any good tutorials for making java 2d or 3d games?

I do not know if I should use a 2D or just two seperate arrays to make this easier. I have two arrays. One is just an array like {1,2,3,4...n} and the other has values that correspond to those and make pairs. I want to create an array that stores …

hi everyone this is my first post and yes, im just starting with cpp im using devc++ so i have this homework which i could get done for its due date but still it would really help me to understand more about cpp if i could get it done but …

Nevermind... fixed it right after posting. Epic. Fail.

I want to Develop a 2d rpg game with java,how do i start and what do i need to know? I have been using java for two years.my team consists of two programmers and one graphic artists

I am using Visual C++ Express Edition on Windows, and I am look at the windows task manager and I noticed that every second, in the process tab the memory of my C++ program increases about 8 K when I am not even doing anything. Also, I've noticed that if …

Hi, I want to copy a row from a 2d vector in an existing 1d vector. I found a similar tread, which copies into a newly defined vector as such: [CODE]vector< data_type > copyRow( vec2d[3].begin(), vec2d[3].end());[/CODE] Now I want to change this code, so that copyRow already exists. My idea …

I have an issues with my int array, i have a game where its like a mega version of Tic Tac Toe where you need 5 to win instead of 3 and i have tried to come up with a system of checking for a winner or not (right now …