stdlib.h

Besides a redefinition of NULL, size_t and wchar_t, this header file contains the type definitions listed in the following table.

Table 1. Type Definitions in stdlib.h
Type Definition	Description
`typedef div_t;`	A struct for the return value of div().
`typedef ldiv_t;`	A struct for the return value of ldiv().

The following table lists the constants defined in stdlib.h

Table 2. Constants Defined in stdlib.h
Constant	Definition
`EXIT_FAILURE`	Exit code for unsuccessful termination.
`EXIT_SUCCESS`	Exit code for successful termination.
`RAND_MAX`	Maximum return value of rand().
`MB_LEN_MAX`	Maximum number of bytes in a multi-byte character.