C++: max integer [duplicate]

Question

Is there a C++ cross-platform library that provides me with a portable maximum integer number?

I want to declare:

const int MAX_NUM = /* call some library here */; 

I use MSVC 2008 unmanaged.

Answer 1

In the C++ standard library header <limits>, you will find:

std::numeric_limits<int>::max() 

Which will tell you the maximum value that can be stored in a variable of type int. numeric_limits is a class template, and you can pass it any of the numeric types to get the maximum value that they can hold.

The numeric_limits class template has a lot of other information about numeric types as well.

Answer 2

See limits.h (C) or climits (C++). In this case you would want the INT_MAX constant.