Try using: This requires your compiler to have rtti support enabled. EDIT: I’ve had some good comments on this answer! Every time you need to use a dynamic_cast (or instanceof) you’d better ask yourself whether it’s a necessary thing. It’s generally a sign of poor design. Typical workarounds is putting the special behaviour for the … Read more
You need to in your bankAccount header file, and refer to the strings as std::string. once it is included in the header, you no longer need to include it in the implementation file.
5.3.5/7 says: If the value of the operand of the delete-expression is not a null pointer value, the delete-expression will call a deallocation function (3.7.4.2). Otherwise, it is unspecified whether the deallocation function will be called. And 3.7.4.2/3 says: The value of the first argument supplied to a deallocation function may be a null pointer … Read more
As mentioned by others there’s no cross platform way to do this, but on Windows you can do it like this: The Code below checks if the key ‘A’ is down. In case of shift or similar you will need to pass one of these: https://msdn.microsoft.com/de-de/library/windows/desktop/dd375731(v=vs.85).aspx The low-order bit indicates if key is toggled. Oh and … Read more
Bit masking is “useful” to use when you want to store (and subsequently extract) different data within a single data value. An example application I’ve used before is imagine you were storing colour RGB values in a 16 bit value. So something that looks like this: You could then use bit masking to retrieve the … Read more
The keyword static has several different meanings in C++, and the code you’ve written above uses them in two different ways. In the context of member functions, static means “this member function does not have a receiver object. It’s basically a normal function that’s nested inside of the scope of the class.” In the context … Read more
Most likely you have some system-specific include directories missing in your settings which makes it impossible for indexer to correctly parse iostream, thus the errors. Selecting Index -> Search For Unresolved Includes in the context menu of the project will give you the list of unresolved includes which you can search in /usr/include and add … Read more
That returns a bunch of unallocated pointers. Your top level array is fine, but its elements are still uninitialized pointers, so when you do this: You invoke undefined behavior. You’re dereferencing an uninitialized pointer. You allocated the array properly, now you need to allocate each pointer, i.e., As an aside, I realize that you’re learning, … Read more
I download eclipse for c++ (cdt-master-8.0.2.zip). When I write: It marks: How can I fix it?
Your compiler isn’t smart enough to take into account that the only two options for side are left and right, so it thinks it’s possible for neither return statement to be executed. When side is neither left nor right, your function doesn’t say which value to return.