abort. McGraw-Hill The Complete Reference Fourth Edition

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C + + : T h e C o m p l e t e R e f e r e n c e

T he standard function library defines several utility functions that provide various commonly used services. They include a number of conversions, variable-length argument processing, sorting and searching, and random number generation.

Many of the functions covered here require the use of the header <cstdlib>. (A C program must use the header file stdlib.h.) In this header are defined div_t and ldiv_t, which are the types of values returned by div( ) and ldiv( ), respectively. Also defined is the type size_t, which is the unsigned value returned by sizeof. The following macros are defined:

Macro

MB_CUR_MAX

NULL

RAND_MAX

EXIT_FAILURE

EXIT_SUCCESS

Meaning

Maximun length (in bytes) of a multibyte character.

A null pointer.

The maximum value that can be returned by the

rand( )

function.

The value returned to the calling process if program termination is unsuccessful.

The value returned to the calling process if program termination is successful.

If a function requires a different header than <cstdlib>, that function description will discuss it.

abort

#include <cstdlib> void abort(void);

abs

The abort( ) function causes immediate abnormal termination of a program. Generally, no files are flushed. In environments that support it, abort( ) will return an implementationdefined value to the calling process (usually the operating system) indicating failure.

Related functions are exit( ) and atexit( ).

#include <cstdlib> int abs(int num); long abs(long num); double abs(double num);