C++ - <cstdint> (stdint.h)

The C++ <cstdint> header defines a set of integral type, along with macros specifying their limits and macro functions to create values of these types.

C++ <cstdint> Types

The following are typedefs of fundamental integral types or extended integral types.

C++ <cstdint> Macros

The below mentioned macros are implementation-specific and defined with the #define directive. The below table shows the different macros in <cstdint> header and their minimal or maximal values in all implementations.

Signed integers : minimum value

Signed integers : maximum value

Unsigned integers : maximum value

Limits of other types

Function-like macros

Example:

The below example describes the working of macros constant of C++ <cstdint> library.

#include <iostream>
#include <cstdint>
using namespace std;

int main (){
  //using int_least16_t type
  int_least16_t x = 10;

  //displaying maximum and minimum value
  cout<<"INT16_MIN: "<<INT16_MIN<<"\n";
  cout<<"INT16_MAX: "<<INT16_MAX<<"\n"; 
  cout<<"UINT16_MAX: "<<UINT16_MAX<<"\n"; 
  cout<<"INT_LEAST32_MIN: "<<INT_LEAST32_MIN<<"\n";
  cout<<"INT_LEAST32_MAX: "<<INT_LEAST32_MAX<<"\n";
  cout<<"UINT_LEAST32_MAX: "<<UINT_LEAST32_MAX<<"\n";

  return 0;
}

The output of the above code is machine dependent. One of the possible output could be:

INT16_MIN: -32768
INT16_MAX: 32767
UINT16_MAX: 65535
INT_LEAST32_MIN: -2147483648
INT_LEAST32_MAX: 2147483647
UINT_LEAST32_MAX: 4294967295