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

The following code throws error ! :(

Code:

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#include <stdio.h>

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

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This works fine! :):)

Code:

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#include <stdio.h>

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

---

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.

Quote:

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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.

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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.