10.A program to perform simple complex number arithmetic operations using an OOP technique 11.A program to read a set of characters from the keyboard and store it in the character array and display...

10.A program to perform simple complex number arithmetic operations using an OOP technique

11.A program to read a set of characters from the keyboard and store it in the character array and display its contents onto the video screen using an OOP technique.

12.A program to read a set of characters from the keyboard and store it in the character array and find out the number of characters that are stored in the array; display its contents onto the video screen using an OOP technique.