C Shell Assignment 11

 
To complete this assignment, run the following command to install the korn shell:
sudo apt-get install ksh
If you want launch the korn shell to test some commands, run the following command:
ksh
To return to you default shell type:
exit
Write a korn shell program that will continually allow the user to input a numeric average for a number of students. After each grade is input the program will output the letter grade for that student. It will continue to ask for more grades until the user enters -1 to stop. Once the user enters -1, have program output the numeric average for all students.
A sample run could be:
What is the next student’s numeric average? 82
That student got a B for the semester.
What is the next student’s numeric average? 77
That student got a C for the semester.
What is the next student’s numeric average? 86
That student got a B for the semester.
What is the next student’s numeric average? 62
That student got a D for the semester.
What is the next student’s numeric average? 95
That student got a A for the semester.
What is the next student’s numeric average? -99
The average for all students is 80.4