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/*
void perror ( const char *string  );

*/ 

  #include 
  #include 

  FILE *fp;
  char msgbuf[256] = "";

  int main(char argv[])
  {
    if (( fp = fopen( "fichier_inconnu", "r" )) == NULL )
	{
		sprintf( msgbuf, 256, "%s, function %s, file %s, line %d",
            argv[0], __func__, __FILE__, __LINE__ );
           perror( msgbuf );
	}
return 0;
  }