Date: 2013may7 Level: beginner Language: C/C++ Q. C/C++: programmatically see how many elements are in an array A. If you have:

int a[10];

You can do:

nElements = sizeof(a) / sizeof(a[0]);

This is a nice idiom. Its better than:

#define N_ELEMENTS (45)

int a[N_ELEMENTS];

nElements = N_ELEMENTS; // Not 100% sure that N_ELEMENTS was use to declare a (in a big program)

In Java you can just do:

a.length