19. Write an object-oriented program in C++ to read a set of lines and find out the number of characters, words, and lines in a given text. 20. Write an object-oriented program in C++ to read a line...

19. Write an object-oriented program in C++ to read a set of lines and find out the number of characters, words, and lines in a given text.

20. Write an object-oriented program in C++ to read a line and find out the number of vowels (a, e, i, o,

u) and consonants present in the given line.

21. Write an object-oriented program in C++ to read a set of lines from the stdin and print out the longest line.