C++
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C Library
IOstream Library
Strings library
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C Library
cassert (assert.h)
cctype (ctype.h)
cerrno (errno.h)
cfloat (float.h)
ciso646 (iso646.h)
climits (limits.h)
clocale (locale.h)
cmath (math.h)
csetjmp (setjmp.h)
csignal (signal.h)
cstdarg (stdarg.h)
cstddef (stddef.h)
cstdio (stdio.h)
cstdlib (stdlib.h)
cstring (string.h)
ctime (time.h)

cassert (assert.h)
assert

cassert (assert.h)

header

C Diagnostics Library

cassert defines one macro that can be used as a standard debugging tool:

Evaluate assertion (macro)