Abstract

A program that you can use to select particular records in a file and perform operations upon them.

awk command 2

Objective

In this challenge, we practice using the awk command for text-munging and data processing tasks.

Resources

The awk interpreter may be used for a lot of text-munging and data-processing tasks that require some quick scripting work.

The following links show examples with awk:

• Print Examples

• Conditionals with Awk

Task

You are given a file with four space separated columns containing the scores of students in three subjects. The first column contains a single character (\(A-Z\)), the student identifier. The next three columns have three numbers each. The numbers are between \(0\) and \(100\), both inclusive. These numbers denote the scores of the students in English, Mathematics, and Science, respectively.

Your task is to identify whether each of the students has passed or failed. A student is considered to have passed if (s)he has a score \(50\) or more in each of the three subjects.

Input Format

There will be no more than \(10\) rows of data.

Each line will be in the following format:

[Identifier][English Score][Math Score][Science Score]

Output Format

Depending on the scores, display the following for each student:

[Identifier] : [Pass]

or

[Identifier] : [Fail]

Sample Input

A 25 27 50 B 35 37 75 C 75 78 80 D 99 88 76

Sample Output

A : Fail B : Fail C : Pass D : Pass

Explanation

Only student C and student D have scored \(\geq 50\) in all three subjects.

Solution

Here we compute the average score for three grades then assign and print a pass or fail grade to that score.

#!/usr/bin/env bash

# shellcheck disable=SC2162
awk '{ sum = $2 + $3 + $4; avg = sum / 3; if (avg > 49) {print $1" : Pass"}; if (avg < 50) {print $1" : Fail"} }' -