IN C++ please

Question 3 (40 points) Listen Problem 2: Not the KSU Newspaper Using Repl.it write a complete program that asks the user for the number of students in their course, declares an array of CHARs using the number of students entered by the user as the size of the array. Program must use a DO...WHILE loop with a SENTINEL value to indicate if user wants to stop entering grades, otherwise it should stop when the array is filled, and must use a SWITCH to keep track of total number of each letter grade entered. Program should display the total number of each letter grade entered once the loop ends, regardless of why the loop ended (array is full, or sentinel value was entered). Format V