How to create a custom C++ exception

Just the facts, ma'am.

Create a header file with the same name as your exception like so:

gcryptinitexception.h
#ifndef GCRYPTINITEXCEPTION_H
#define GCRYPTINITEXCEPTION_H

class GcryptInitException: public std::exception {

public:
    GcryptInitException() {}

    virtual const char* what() const throw() {
        return "Couldn't initialize gcrypt.";
    }
};

#endif // GCRYPTINITEXCEPTION_H

Then #include your header file and throw it like this:

throw GcryptInitException();

(Don’t forget the parenthesis at the end)

C++
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