What is a no-argument constructor? Does every class have a no-argument constructor? What is a default constructor? What would be the last line in the dialogue in Display 4.18 if the user entered the...

What is a no-argument constructor? Does every class have a no-argument

constructor? What is a default constructor?

What would be the last line in the dialogue in Display 4.18 if the user entered

the following input line instead of the one shown in Display 4.18? (The

comma is omitted.)

Savitch Walter None