with while loops

Write a C++ program to read grades from the keyboard, and prints their average to the screen. The program should continuously inset grades until the user insert -1 Write a C++ program to read N characters, where N is a number read from the keyboard. Your program should keep reading characters from the keyboard until symbol # is entered or the number of entered characters equal N. After reading a character the program should print one of the following: * Capital, if the entered character is capital. Small, if the entered character is small. Digit, if the entered character is digit None, otherwise