assert.3x (2010 09)

assert(3X) assert(3X)

NAME

assert( ) - verify program assertion

SYNOPSIS

#include <assert.h>

void assert(int expression);

DESCRIPTION

This macro is useful for putting diagnostics into programs. When it is executed, if expression is false

(zero),

assert() prints:

Assertion failed: expression , file xyz, line

nnn

on the standard error output and aborts. In the error message, xyz is the name of the source ﬁle and nnn

the source line number of the

assert() statement.

Compiling with the preprocessor option

-DNDEBUG (see cpp (1)), or with the preprocessor control state-

ment

#define NDEBUG ahead of the #include <assert.h>

statement, stops assertions from

being compiled into the program.

WARNINGS

The expression argument used by

assert() in compatibility mode cannot contain string literals or dou-

ble quotes without escapes.

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assert(3X) assert(3X) NAME assert( ) - verify program assertion SYNOPSIS #include void assert(int expression); DESCRIPTION This macro is useful for putting diagnostics into programs. When it is executed, if expression is false (zero), assert() prints: Assertion failed: expression , file xyz , line nnn on the standard error output and aborts. In the error message, xyz is the name of the source file and nnn the source line number of the assert() statement.
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(Notes) A (Notes) aA 2 Hewlett-Packard Company −1− HP-UX 11i Version 3: September 2010