Reading 5 Students names and grades using while loop???? Post: 302147201

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Top Forums Shell Programming and Scripting Reading 5 Students names and grades using while loop???? Post 302147201 by dlbomber1 on Monday 26th of November 2007 12:34:51 AM

11-26-2007

Registered User

Reading 5 Students names and grades using while loop????

How do I write a shell script file to read 5 student names (First and Last name) and their grades using a While Loop? Find the Average, Maximum, and Minimum of grades using the same While Loop. Prompt the user using tput to enter the information (first name, last name, grade). Save the data in a file called students.txt. Sort the file by last name and display it on the screen. Someone gave me this to go buy but im way basic and am not sure if there is anything missing from this. I also need to be able to use Tput.
If anyone can help me get this done or tell me whats missing id appreciate it.

1. suppose file is of form "Name Surname Grade"

#!/bin/zsh

sum=0
min=10000
max=0
n=5
i=0
file="students.txt"

cat $file | while read line; do
set line
grade=$3
sum='expr $sum + $grade'
if [ $grade -gt $max ]; then
max=$grade
fi
if [ $grade -lt $min ]; then
min=$grade
fi
i='expr $i + 1'
if [ $i -ge $n ]; then
break
fi
done

average='expr $sum / $i'
echo "Max: $max Min: $min Avg: $average"

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LEARN ABOUT PLAN9

plot

PLOT(1) 						      General Commands Manual							   PLOT(1)

NAME

       plot - graphics filter

SYNOPSIS

       plot [ file ...	]

DESCRIPTION

       Plot  interprets  plotting instructions (see plot(6)) from the files or standard input, drawing the results in a newly created 81/2(1) win-
       dow.  Plot persists until a newline is typed in the window.  Various options may be interspersed with the file arguments; they take  effect
       at the given point in processing.  Options are:

       -d	 Double  buffer: accumulate the plot off-screen and write to the screen all at once when an erase command is encountered or at end
		 of file.

       -e	 Erase the screen.

       -c col	 Set the foreground color (see plot(6) for color names).

       -f fill	 Set the background color.

       -g grade  Set the quality factor for arcs.  Higher grades give better quality.

       -p col	 Set the pen color.

       -w	 Pause until a newline is typed on standard input.

       -C	 Close the current plot.

       -W  x0,y0,x1,y1
		 Specify the bounding rectangle of plot's window.  By default it uses a 512x512 window in the middle of the screen.

SOURCE

       /sys/src/cmd/plot

SEE ALSO

       81/2(1), plot(6)

																	   PLOT(1)