C Language Perror function

C Language Perror functionperror

header files: #include <stdio.h>
function prototype: void Perror (char * string)
function Description: the output outputs the cause of the most recent error to standard error (stderr), where string is first output to a standard error, followed by an error reason string, which causes the error to follow the value of the global variable errno
**errno global Variable Description: * * There is a errno variable in the library function, and each errno value corresponds to the type of error represented by a string. When you call the "some" function, the function has reset the value of errno. That is, the perror function simply outputs some of the information you enter along with the errors that are now errno.

C Language Perror function