Chapter 3, Problem 2RQE

Program Plan Intro

C-String:

In C++, a declaration of an array of “char” is usually referred as “C-string”. But an array of “char” is not a C-string by itself.

• An effective C-string needs an occurrence of a terminating null character “\0”.
• No header file is required to make a C string because “char” is a built data type. Therefore, “<cstring>” file contains several functions that work on C string.

Example:

Consider the below declaration of C string variable:

char student_name[10];

• Here the data type “char” is defined first and it is followed by the variable name “student_name”.
• The “[10]” is referred as “size declarator”. It indicates how many characters it can hold in memory cells.