C++ Primer Plus

Setting Up Ranges with &&

The && operator also lets you set up a series of if else if else statements, with each choice corresponding to a particular range of values. Listing 6.6 illustrates the approach. It also shows a useful technique for handling a series of messages. Just as a pointer-to-char variable can identify a single string by pointing to its beginning, an array of pointers-to-char can identify a series of strings. You simply assign the address of each string to a different array element. Listing 6.6 uses the qualify array to hold the addresses of four strings. For example, qualify[1] holds the address of the string "mud tug-of-war\n". The program can then use qualify[1] as it would any other pointer to a string—for example, with ...