How to determine the size of an array of strings in C++?

Question

I\'m trying to simply print out the values contained in an array.

I have an array of strings called \'result\'. I don\'t know exactly how big it is because it was au

Answer 1

You cannot determine the size of an array dynamically in C++. You must pass the size around as a parameter.

As a side note, using a Standard Library container (e.g., vector) allieviates this.

In your sizeof example, sizeof(result) is asking for the size of a pointer (to presumably a std::string). This is because the actual array type "decays" to a pointer-to-element type when passed to a function (even if the function is declared to take an array type). The sizeof(result[0]) returns the size of the first element in your array, which coincidentally is also 16 bytes. It appears that pointers are 16 bytes (128-bit) on your platform.

Remember that sizeof is always evaluated at compile-time in C++, never at run-time.