C++ How to Program, 10/e

... Objects and Displaying Them with cout and Operator <<

Lines 8–10 create three string objects:

• s1 is initialized with the literal "happy",

• s2 is initialized with the literal " birthday" and

• s3 uses the default string constructor to create an empty string.

Lines 13–14 output these three objects, using cout and operator <<, which the string class designers overloaded to handle string objects.

Comparing string Objects with the Equality and Relational Operators

Lines 15–21 show the results of comparing s2 to s1 by using class string’s overloaded equality and relational operators, which perform lexicographical comparisons (that is, like a dictionary ordering) using the numerical values of the characters in each string (see Appendix B, ASCII Character ...