The function char * strerror (int errnum) searches for an internal array for errnum error numbers and returns a pointer to a string of error messages.
Declaring strerror () function in C
Here is the declaration for strerror () in C:
char * strerror ( int errnum )
Parameters
errnum - Usually errno , describes the error number.
Returns the value
This function returns a pointer to the error string describing errnum error.
For example
The following C program illustrates the usage of strerror () in C:
#include #include #include int main () { FILE * fp ; fp = fopen ( "thuvienc.txt" , "r" ); if ( fp == NULL ) { printf ( "Error: %sn" , strerror ( errno )); } return ( 0 ); }
Compiling the C program will result (because we open a file that does not exist):
According to Tutorialspoint
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