Reference
C Library
IOstream Library
Strings library
STL Containers
STL Algorithms
Miscellaneous
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)
cstring (string.h)
functions:
memchr
memcmp
memcpy
memmove
memset
strcat
strchr
strcmp
strcoll
strcpy
strcspn
strerror
strlen
strncat
strncmp
strncpy
strpbrk
strrchr
strspn
strstr
strtok
strxfrm
macros:
NULL
types:
size_t


strerror

function
<cstring>
char * strerror ( int errnum );

Get pointer to error message string

Interprets the value of errnum generating a string describing the error that usually generates that error number value in calls to functions of the C library.

The returned pointer points to a statically allocated string, which shall not be modified by the program. Further calls to this function will overwrite its content.

The error strings produced by strerror depend on the developing platform and compiler.

Parameters

errnum
Error number.

Return Value

A pointer to the error string describing error errnum.

Example

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/* strerror example : error list */
#include <stdio.h>
#include <string.h>
#include <errno.h>
int main ()
{
  FILE * pFile;
  pFile = fopen ("unexist.ent","r");
  if (pFile == NULL)
    printf ("Error opening file unexist.ent: %s\n",strerror(errno));
  return 0;
}


A possible output:
  
Error opening file unexist.ent: No such file or directory


See also

perror Print error message (function)