- I need to write a program in c that prompts the user to enter the scores for four quizzes each worth a maximum of 100 points. Your program should compute the average score and display this average together with a letter grade based on the following scale:
90 - 100 A
80 - 89 B
70 - 79 C
60 - 69 D
0 - 59 F
Your program must also check for valid input i.e. the score can not be less than zero or greater than 100.
I have throughly read the chapter and completed the hands-on but I am lost