Fix iostream.h include; incorrect variable names #309
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include <iostream.h>is wrong, it'sinclude <iostream>as used in the other parts.Variable names starting with an underscore followed by an uppercase letter are reserved for the implementation, same for variables containing two consecutive underscores.
https://stackoverflow.com/questions/228783/what-are-the-rules-about-using-an-underscore-in-a-c-identifier
Note that the
using namespace std;is actually frowned upon, but as it's so wildly in use (and also the default on ideone) I didn't change that. Also there's some minor terminology mistakes but I doubt that the book benefits from fixing those.