C++ PRogram Assignment Help

I need help with a programming assignment that prompts the user for a single character as an argument. This character should represent a letter grade. The program should print a single line string for each different grade.

Example:

A ....... should output Excellent

B ....... should output Good

C ....... should output Average

D ....... should output Poor

F ....... should output Failing

The case of the letter should not matter. Lowercase letters should print the same result as uppercase letters.

Thanks for the help!