C - <stdint.h>

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

C <stdint.h> Types

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

C <stdint.h> Macros

The below mentioned macros are implementation-specific and defined with the #define directive. The table below shows the different macros in <stdint.h> 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 example below describes the working of macros constant of C <stdint.h> library.

#include <stdio.h>
#include <stdint.h>

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

  //displaying maximum and minimum value
  printf("INT16_MIN: %d\n", INT16_MIN);
  printf("INT16_MAX: %d\n", INT16_MAX); 
  printf("UINT16_MAX: %d\n", UINT16_MAX); 
  printf("INT_LEAST32_MIN: %d\n", INT_LEAST32_MIN);
  printf("INT_LEAST32_MAX: %d\n", INT_LEAST32_MAX);

  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