C++ Primer Plus

More string Class Operations

Even before the string class was added to C++, programmers needed to do things like assign strings. For C-style strings, they used functions from the C library for these tasks. The cstring header file (formerly string.h) supports these functions. For example, you can use the strcpy() function to copy a string to a character array, and you can use the strcat() function to append a string to a character array:

strcpy(charr1, charr2);  // copy charr2 to charr1strcat(charr1, charr2);  // append contents of charr2 to char1

Listing 4.9 compares techniques used with string objects with techniques used with character arrays.

Listing 4.9. strtype3.cpp

// strtype3.cpp -- more string class features#include <iostream>#include ...