# Purpose: Write a Unix shell script (one program) called Project1_lastname (your lastname). 
# This script will do the following tasks:
# Using "if" statement checks for a file called "student.txt" in the current directory. 
# Removes (deletes) the file if it exist. This file will collect last name, first name, and grade for 5 students.
# Use a while loop to get the information (last name, first name, and grade) for 5 students. 
# Grades should be 0-100. Use three different variable names (fname, lname, and grade) to read the data from the keyboard. 
# Store the data read from the keyboard in a file called "student.txt". 
# After reading all the data for 5 students, display contents of student.txt file on the monitor.

Prompt the user using tput command to read the information. tput will show the prompt (i.e "Enter first name: ") at the certain row and column. Use 3 tputs, one for each prompt. 
Sort "student.txt" file by the last name and display it on the screen. 

At least 3 tput commands. One tput for each prompt. Use tput command to display the prompts in certain rows and columns. 

- Sort student.txt file by last name (Second field). 

- Display the sorted information on the screen. First name, last name, and grade for the 5 students. 

FILE="student.txt"
if test -f $FILE # use -f to see if the filename exist. 
#You also can use other options like -r (read) or -w (write)
then
rm $FILE
fi 

count=1 # Initialize counter to start from 1

while (( $count < 6 )) # Is count less than 6? If it is continue going inside the loop 
# to read more student's data
do
echo "Please enter first name: c"
read fname
echo "Please enter last name: c"
read lname
echo "Please enter grade (0-100): c"
read grade
(( count=count+1 )) # Add one to the counter 
echo "$fname $lname $grade" >> student.txt
done
cat student.txt
exit 0 


Initialize all your variables (sum, counter, max and min)

counter = 1 # Initialize the counter value 
# initialize maximum, minimum and sum values
maximum number = 0
mininum number = 100
sum = 0

While counter < 6 (Read 5 students' information)

Prompt for first name
input first name
Prompt for last name
input last name
Prompt for grade
input grade

If this new grade is > old maximum then

New maximum = new grade

If this new grade is < old minimum then

New minimum = new grade

Adjust the counter
sum = sum + new grade # old sum value + new grade = New sum value


End Loop


#Find the average

average = sum/# of people