C++ Primer Plus

The if else if else Construction

Computer programs, like life, might present you with a choice of more than two selections. You can extend the C++ if else statement to meet such a need. As you’ve seen, the else should be followed by a single statement, which can be a block. Because an if else statement itself is a single statement, it can follow an else:

if (ch == 'A')    a_grade++;               // alternative # 1else    if (ch == 'B')           // alternative # 2        b_grade++;           // subalternative # 2a    else        soso++;              // subalternative # 2b

If ch is not 'A', the program goes to the else. There, a second if else subdivides that alternative into two more choices. C++’s free formatting enables you to arrange these ...