Study after the Dragon Boat Festival

Busy Dragon Boat Festival has passed, I should continue my C + + is said to allow language learning, today to go on the last study began,a+b+c problem:

(2) Mathematical functions: square root function sqrt(), sine sin (),cosine cos (),

(3) If

(4) Code style indentation:

(5) Question-Mark expression:

A question mark expression is a shorthandfor a if-else statement in the form of:( condition )? Value 1': ' Value 2'; when the condition conforms to Yes, the value of the expression is "value 1 ", otherwise" value 2 ".

(6) Divide the problem:

(7) Use of namespaces:

The scope of the namespace (namespace) and the scope of thedeclaring variable are similar.

(8) Conditional statement Switch-case

Study after the Dragon Boat Festival