C++ maximum non negative int

Question

Is the following going to work as expected on all platforms, sizes of int, etc? Or is there a more accepted way of doing it? (I made the following up.)

#define M         


        

Answer 1

If you don't want to use defines (and you want a standard way of calculating the limits), then do this:

#include 
std::numeric_limits::min()

These are the ANSI standard defines in limits.h:

#define INT_MIN     (-2147483647 - 1) /* minimum (signed) int value */
#define INT_MAX       2147483647    /* maximum (signed) int value */
#define UINT_MAX      0xffffffff    /* maximum unsigned int value */

These are the defines from BaseTsd.h:

#define MAXUINT     ((UINT)~((UINT)0))
#define MAXINT      ((INT)(MAXUINT >> 1))
#define MININT      ((INT)~MAXINT)