Design a program that calculates the study average

Assignment:

Ask for max. 9 (restrict as you want marks in the format A B B A C E F Z X (without or with spaces [or Enter]):

The program can accept the following values:

A, B, C, D, E, FX (F), X, Z, NZ

if the value is entered incorrectly, the program deletes the incorrect value and continues

exit with ENTER key

Convert

The program converts the values as follows:

A, Z - 1

B - 1.5

C - 2

D - 2.5

E - 3

F, FX NZ - 4

X - 0

The program goes on:

Calculates the average

Detects the full number of marks

It then makes an arithmetic mean

Lists

The program prints the resulting average (rounded to 2 numbers, the third is rounded!), Eg:

Average: 2.81

The program ends

thank you