ASSERT

Section: C Library Functions (3)
Updated: August 1, 1992
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NAME

assert - program verification

SYNOPSIS

#include <assert.h>

void assert(int expression);

DESCRIPTION

Assert is a macro that indicates expression is expected to be true at this point in the program. It causes an abort(3) with a diagnostic comment on stderr when expression is false (0). Compiling with the cc(1) option -DNDEBUG effectively deletes assert from the program.

DIAGNOSTICS

`Assertion failed: file f line n.' F is the source file and n the source line number of the assert statement.

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