C++ Primer Plus

Inside Strings with the for Loop

The for loop provides a direct way to access each character in a string in turn. For example, Listing 5.6 enables you to enter a string and then displays the string character-by-character, in reverse order. You could use either a string class object or an array of char in this example because both allow you to use array notation to access individual characters in a string; Listing 5.6 uses a string class object. The string class size() method yields the number of characters in the string; the loop uses that value in its initializing expression to set i to the index of the last character in the string, not counting the null character. To count backward, the program uses the decrement operator (--) to decrease the ...