std::strerror
From cppreference.com
Defined in header <cstring>
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char* strerror( int errnum ); |
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Returns text version of the error code errnum. errnum is usually acquired from the errno variable, however the function accepts any value of type int. The message is locale-specific.
The returned byte string must not be modified by the program, but may be overwritten by a subsequent call to the strerror function.
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[edit] Parameters
errnum | - | integral value referring to a error code |
[edit] Return value
Pointer to a null-terminated byte string corresponding to the error code errnum.
[edit] Example
#include <iostream> #include <cmath> #include <cerrno> #include <cstring> int main() { double not_a_number = std::log(-1.0); if (errno == EDOM) { std::cout << "log(-1) failed: " << std::strerror(errno) << '\n'; } }
Output:
log(-1) failed: Numerical argument out of domain
[edit] See also
macros for standard POSIX-compatible error conditions (macro constant) | |
C documentation for strerror
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