small snippet don't know why it doesn't work

[Beholder2]

hello I'm a little confused as to why this isn't working, I think it may be the IDE/compiler I use which is Dev c++ 4 (I didn't know what other group to post this in) Its a snippet from a larger program I'm using I wanted to test what exactly wasn't working. I have a 2d array and to test it you enter four values, 2 per element. If you enter 123 and 4 the output should be 1234, but for some reason the first element is overwritten by the second. heres the code:

#include <iostream.h>
#include <stdlib.h>
#include <stdio.h>
#include <windows.h>
#include "conio.h"
#include <iomanip.h>
#include <string>
using namespace std;
int main()
{
char test[2,2];
int a=0 ;
int b=0;
do {
b=0;
do {
test[a,b]= getche();
b++;
}while (b <=1);
a++;
} while (a <=1);

int x=0;
for (;x <= 1;x++){

for (int y=0; y <= 1; y++){
cout << test[x,y];

endl;
}
}
system("PAUSE");
return 0;
}

thanks for any suggestions
Beholder

 

[Salem]

Please use the [tt][ignore]

[/ignore][/tt] tags when posting code.

> char test[2,2];
This isn't a 2D array, it's only 1D

Try
[tt]char test[2][2];[/tt]

And change your array references to use two sets of [ ] as well.

--

 

[Beholder2]

Thanks, I guess was thinking I was using qbasic or something for a second.

 

[Beholder2]

On second thought, what is my code doing then? with the input 1234 I get the output 3434, you'd think the compiler would say something if it was incorrect syntax. Unless its storying two instances of two input values, I don't know, I can't find anything anywhere that says anything about declaring an array as [2,2].

 

[ArkM]

There is comma operator in C and C++: do the 1st then do the 2nd subexpression. So [2,2] is exactly the same as [2].
It's syntactically correct construct.