Write a program which reads student names, social security numbers, and test sco

Question

Write a program which reads student names, social security numbers, and test scores from an input file named infile.

The program then computes a weighted average, finds the appropriate letter grade, and displays the formatted output

specified below to the screen. The information reading should be controlled by a while Loop. Termination should

occur after the input file is empty. If a student has a grade of "A" (0.90 or more) and each score is at least 0.85, then

a mark of distinction should be entered in the output. The range will be computed by the difference of the highest

and lowest grade for a student.

Readings: Building Blocks: Types, Classes, and Objects, While loop, File Stream I/O

Explanation / Answer

import java.lang.*;

import java.util.*;

import java.io.*;

class StudentGrade

{

public static int ReadInteger()

{

try

{

InputStreamReader input = new InputStreamReader(System.in);

BufferedReader reader = new BufferedReader(input);

return Integer.parseInt(reader.readLine());

}

catch (Exception e)

{

e.printStackTrace();

return 0;

}

}

public static void main(String[] args)

{

System.out.println("Program for simple student grading logic.");

int MAX_STUDENTS = 10;

int [] arrMark = new int[MAX_STUDENTS];

String grade = "";

for (int i = 0; i < MAX_STUDENTS; i++)

{

System.out.format("Enter %d Student Mark: ", i + 1);

arrMark[i] = ReadInteger();

}

System.out.print(" No Mark Grade ");

for (int i = 0; i < MAX_STUDENTS; i++)

{

if(arrMark[i] > 100)

grade = "Error";

else if(arrMark[i] > 90)

grade = "A+";

else if(arrMark[i] > 70)

grade = "B+";

else if(arrMark[i] > 50)

grade = "C+";

else if(arrMark[i] > 30)

grade = "C";

else

grade = "F";

System.out.format("%d %d %s ", i + 1, arrMark[i], grade);

}

}

}

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