Gendou.com Forum: Programming: variable's variable? Edited: Arrays (in Java)

variable's variable? Edited: Arrays (in Java)

Link | by

on 2008-03-08 20:09:13 (edited 2008-03-09 08:46:58)

Well, the problem is that I need many of variable.
For example, int point0, point1, point2, ... point500)
Therefore I got to initiate them.

What I thought was, "This is such ineffective way of programming.
Then I tried to make the program initiate variable by itself.

To produce massive work, we use looping.
for(int amount=1; amount<=500; amount++){int xxx}

The question, what should we fill xxx?
Is there any other way to do massive initiation of same data type?

P.S.: I know it may sounds ridiculous, but an idea is an idea.

Edited:

I use an array (int win[]) to store the massive amount of of variable.

Thanks for reading.

P.S.: It was ridiculous!

-Problem 1 Solved-

Problem 2

Now that I've stored some numbers on an array (win[])

I'd like to display the integer in percentage

Therefore I typed:



int round = 500



for (int b = 0; b < 100; b++)

{

    percentage[b] = (win[b] / round);

    

    System.out.println(+b +" = " +percentage[b] +"%");

}

What happened on the output is:
All the percentage (percentage[b]) are zero
Even that there are not zero amount on win[b]

Why is it?
How to solved it? (have the percentage of number stored at win[b])

Dream ends when we wake up and life ends when we die.
What's the different?

Re: variable's variable? Edited: Arrays (in Java)

Link | by zehippo on 2008-03-09 10:22:43 (edited 2008-03-09 10:23:34)

Multiply win[b] by 100 before you multiply, or divide it by 5 rather than 500, or use floating point numbers.

i.e.

percentage[b] = (win[b] * 100 / round);

or

float percentage[]; // or something



percentage[b] = ((float)win[b] / round);

System.out.println(+b +" = " +percentage[b]*100.0 +"%");

Or.. um.. something along those lines. I'm not proficient in Java, but I think these solutions would probably solve your issue.

Re: variable's variable? Edited: Arrays (in Java)

Link | by

on 2008-03-09 11:31:09 (edited 2008-03-09 11:33:12)

Float or even Double! That's it, int would be inappropriate variable data type, how come I didn't notice...
Moreover, If it is not multiplied by 100 how could I call that "percentage".
Ah...

Thanks zehippo.

-Problem 2 Solved-

Dream ends when we wake up and life ends when we die.
What's the different?

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