Creating a low-resolution of the night sky (...help?)

• November 19th, 2012, 02:20 PM
Wwong3333
Creating a low-resolution of the night sky (...help?)
Greetings everybody =)

My assignment: create a low resolution image of the night sky using +'s as stars and spaces as the space.
-have to use a 2 dimensional array
-can be any type of array
-choose 100 cells at random to be stars

problem: for some reason, I can't print out 100 stars but only 80 :(.. i've been working for a long time on this code with much frustration and with little progress..

Code Java:

``` UW PICO(tm) 4.10 File: assignment11.java   // Programs purpose: prints out low resolution image of a night sky, using +'s as stars and " " as space. // Step 1: Create a 80 x 20 2 dimensional array. // Step 2: Choose 100 random cells to become stars. // Step 3: Print out the night sky using " " as space and +'s as stars.   public class assignment11 { public static void main(String []args) { // List of variables final int scaleOne = 80; // Scale of 80 final int scaleTwo = 20; // Scale of 20   // Create an 80 x 20 2 dimensional array int[][] nightSky = new int[scaleOne][scaleTwo];   // Randomize 100 cells for the array int randOne = (int)(Math.random()*scaleOne); int randTwo = (int)(Math.random()*scaleTwo);   // Set the random 100 cells to be 0 nightSky[randOne][randTwo] = 0;   // Prints out the night sky for(int row = 0; row < nightSky.length; row++) { // If the random 100 cells are 0 if(nightSky[randOne][randTwo] == 0) { // Display a star for each cell that is zero System.out.print("+"); } for(int col = 0; col < nightSky.length; col++) { // Print out a space for the rest of the cells System.out.print(" "); } } } }```

I can't seem to find a problem in my code.. It looks like i done everything correctly.
when i try to increase the number of the math.random..., i get a arraysOutofbounds exception.. sigh