PLEASE ANSWER USING C++ (NOT JAVA)

(Convert letter grade to number) Write a program that prompts the user to enter a letter grade A/a, B/b, C/c, D/d, or E/e and displays its corresponding numeric value 4, 3, 2, 1, or 0. Here is a sample run:

Enter a letter grade: B The numeric value for grade B is 3

Enter a letter grade: b The numeric value for grade b is 3

Enter a letter grade: T T is an invalid grade