DaWei

It involves more than the plus button. It involves what surrounds the '+' sign, as well. With typical rules of precedence, 3 * 4 + 2 is not the same thing as 3 * (4 + 2).

You can see that "what you do" with the plus depends on the surroundings, and not just the immediate surroundings (4 and 2).

That's why I recommended you do some research. There's little learning in copying any code I might post. You need to understand why it's written the way it is.

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Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code.
Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers