perror
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| C Standard Library headers |
The POSIX error function, perror, is used in C and C++ to print an error message to stderr, based on the error state stored in errno.
Contents |
[edit] History
The definition of perror was first released in Issue 1 of the System V Interface Definition.
[edit] Usage
[edit] Inclusion
- C
#include <stdio.h>
- C++
#include <cstdio>
[edit] Declaration
void perror(const char* prefix);
[edit] Semantics
If the parameter prefix is non-NULL, perror will first print prefix followed by a colon and a space to standard error. Then, it will print the result of strerr to standard error, followed by a newline character.
