(This exercise is for those who have studied the optional section entitled “File Names as Input.”) Suppose you are given the following string variable declaration and input statement: #include using...

(This exercise is for those who have studied the optional section entitled

“File Names as Input.”) Suppose you are given the following string

variable declaration and input statement:

#include

using namespace std;

// ...

char name[21];

cout >> name;

Suppose this code segment is embedded in a correct program. What is the

longest name that can be entered into the string variable name?