Minimum sizes for integral types

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What does the C++ standard state the size of int, long type to be? 24 answers

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The actual size of integer types varies by implementation. The standard only requires size relations between the data types and minimum sizes for each data type:

The relation requirements are that the long long is not smaller than long , which is not smaller than int , which is not smaller than short . As char 's size is always the minimum supported data type, all other data types can't be smaller.

The minimum size for char is 8 bits, the minimum size for short and int is 16 bits, for long it is 32 bits and long long must contain at least 64 bits.

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To obtain the max/min number for each type you can call:

#include <limits>
const int min_int = std::numeric_limits<int>::min();
const int max_int = std::numeric_limits<int>::max();

or C solution:

#include <limits.h>
const int min_int = INT_MIN;
const int max_int = INT_MAX;

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