2.3. Comments
C++ supports two comment formats. The first is a one-line format.
// this is a comment line
The compiler treats all text following the double slashes as a comment, which may appear on a line by itself or follow a C++ statement. Once you begin a comment with //, the compiler terminates the comment with a newline. We've been using one-line comments all along, but here are some more examples.
// define a circle const double pi = 3.14159; // constant value pi double radius = 2.5; // radius of a circle double area; // area of a circle double circum; // circumference of a circle area = pi * radius * radius; // calculate area circum = 2 * pi * radius; // calculate circumference // double volume; // circles don't have volumes
Note that ...
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