Thread: Why do we need to specify column size when writing a 2D array In C??

The following code throws error !

Code:

#include <stdio.h>

int main(void)
{
      int array[][]={{1,2,3},{123,244,232}};
}

This works fine!

Code:

#include <stdio.h>

int main(void)
{
      int array[][3]={{1,2,3},{123,244,232}};
}

Originally Posted by GReaper

Because only the leftmost index can be arbitrary, all other indices must have a fixed size. In other words, all 2D arrays in C must be rectangular, with the same amount of columns for every row.

That is what is written in the book. There is a post on stack overflow about this. Here

Can you please explain it. I can't seem to understand the answer to the question in that post. Please

ans 20 explained it rather well.

In the example question you posted, the OP is asking about passing an array to a function. This is a little bit different than your plain array definition.