strerror函数的使用

 

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

 

/* 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;
}

 

 

Error opening file unexist.ent: No such file or directory

 

 

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