Two strings between brackets separated by a comma in C++ [duplicate]

Answer 1

Comma operator ( , ) The comma operator (,) is used to separate two or more expressions that are included where only one expression is expected. When the set of expressions has to be evaluated for a value, only the rightmost expression is considered.

For example, the following code:

a = (b=3, b+2);

Ref:http://www.cplusplus.com/doc/tutorial/operators/