C++ Primer Plus

Memory Miscellany

Several methods deal with memory—for example, clearing memory contents, resizing a string, or adjusting the capacity of a string. Table F.2 lists some memory-related methods.

Table F.2. Some Memory-Related Methods

String Access

There are four methods for accessing individual characters, two of which use the [] operator and two of which use the at() method:

reference operator[](size_type pos);const_reference operator[](size_type pos) const;reference at(size_type n);const_reference at(size_type n) const;

The first operator[]() method allows you to access an individual element of a string by using array notation; it can be used ...