need help writing this program in c++

PLEASE MAKE THE OUTPUT EXACT SAME AS BELOW

Write a complete program that: 1. Prompts the user to enter a letter grade and reads in a letter grade from the keyboard as a char. 2. Uses a switch statement to output the appropriate range for the grade entered in (2) 3. If a letter is entered in (2) that is not a valid letter grade an error should be displayed. This error handling should be done via the default case of your switch statement. Valid letter grades are: A, a, B, b, Coc, D, d, F, and f. Ranges for each letter grade: GRADE RANGE 90-100 B 80-89.99 70-79.99 D 60-69.99 F 0-59.99 Enter a letter grade **A Grade range is 90 - 100