Paul Evans questions

Paul Evans answers

• C++ class definition split into two headers?
• system("history") not working
• How can I use a mixture of array and map in C++?
• C++ how to stop from crashing if entering letters
• Why were the iostream_withassign, ostream_withassign & istream_withassign classes removed from the C++ I/O system?
• C++ - const keyword in methods and overload
• Correct C++ approach to store multi-type data
• "typename" and "template" keywords: are they really necessary?
• function declaration without definition
• Optimized way to find if a number is a perfect square