solve it in C++ please

Exercise # 2: write a program that prompts the user to enter a character grade and prints a massage and the grade. If the grade is a, A print Excellent, if the grade is b, B, c, C print Well done, if the grade is d, D print You passed, if the grade is F, f print Better try again, and if the grade is any other letter print invalid grade. Sample input/output: Enter a grade: Enter a grade: h Invalid grade. 1l done. Your grade is c 1/2 1123 T End Pg Dn Enter Alt ? Ctrl