[ACCEPTED]-C++: How to pass parameters to custom exceptions?-exception-handling
Accepted answer
You have correctly passed the parameters 8 to the constructor of your exception class.
But, the 7 function MyEmptyImageException::what() is incorrect because it returns 6 msg.c_str(), where msg is allocated on the stack. When 5 the function what() returns, them msg object is destroyed, and 4 the char* pointer points to the buffer managed 3 by a deallocated object. To fix that, you 2 can construct the message in the constructor 1 of MyEmptyImageException itself:
class MyEmptyImageException : public MyIOException
{
std::string m_msg;
public:
MyEmptyImageException(const std::string& bn, const std::string& on)
: m_msg(std::string("Empty Image : ") + bn + on)
{}
virtual const char* what() const throw()
{
return m_msg.c_str();
}
};
Source:
stackoverflow.com
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