Incompatible operand types int and double[][]

[Haske2r]

Hello

I just started java and try to do a programm wich is able to give me a fast solution of the Gaus System. (If anyone knows ;-) )

But I got a problem:

import java.util.Scanner;
public class Info {

/**
* @param args
*/
public static void main(String[] args) {

int a;
double b [][] = new double [4][4];
int c;

Scanner in = new Scanner(System.in);

System.out.println("Hello, first equation please:");
for(a=0 ; a< b.length ;a++){
System.out.println("Number:" + (a+1) + "");
if (a==b) Incompatible operand types int and double[][]
a= 0;


for(c=0; c<b.length;c++)

b [a][c] = in.nextDouble();

}
System.out.println("The first equation:");
System.out.println( b[0] +" x1 " +b[1]+" x2 "+ b[3]+ " x3 = " +b[3]);

}

}
If you are able to help me I would be verry happy :)

[JosAH]

Variable 'a' has type int and variable 'b' has type double[][]; how can you compare the two for equality? Answer: you can't and that's why the compiler is whining at you.

kind regards,

Jos

[[RaIdEn]]

the best thing you can do is make a cast and into quality of a specific element in the array.

a==(int) b[1][2] or something.