How to Find Dimension of a Multiple Dimension Array in C

Question

I declared a 2-dimensional array like this:

char *array[][3] = {

    {"a", "b", "c"},

    {"d", "e", "f"},

    {"u", "v", "w"},

    {"x", "y", "z"}};

How do I find out the first dimension?

Recommended for you: Get network issues from WhatsUp Gold. Not end users.

Answer 1

sizeof array / sizeof array[0]

BTW, please don't worry about the lack of function-like parens following sizeof. It's really an operator; those parens have always been optional. I did test this expression with the following program:

printf("%zd\n", sizeof array / sizeof array[0]);

(Use %d for C89.)

How to Find Dimension of a Multiple Dimension Array in C

sizeof array / sizeof array[0]

Sign up