Practical Project 2 - 420-D01-SU: Grade Calculation Program

This document presents a solution for a practical assignment involving a Java program designed to calculate a student's grade based on input marks. The program takes marks for four subjects, calculates the average, and then assigns a grade (A, B, C, or D) based on the average score. The document includes the Java code, a trace table demonstrating the program's execution step-by-step, and a description of the program's functionality. The assignment brief outlines the requirements for the practical project, including the need to create files for each exercise, complete the analysis, write pseudocode, and construct a trace table. This particular solution focuses on exercise 47 from the provided list of questions. The project emphasizes teamwork and requires students to submit their work in a compressed .zip file.

Question 47: Program for grade
import java.util.Scanner;
public class Grade
{
public static void main(String args[])
{
int marks[] = new int[4];
int i;
float total=0, avg;
Scanner scanner = new Scanner(System.in);
for(i=0; i<4; i++) {
System.out.print("Enter Marks of Subject"+(i+1)+":");
marks[i] = scanner.nextInt();
total = total + marks[i];
}
scanner.close();
avg = total/6;
System.out.print("The student Grade is: ");

if(avg>=80)
{
System.out.print("A");
}
else if(avg>=60 && avg<80)
{
System.out.print("B");
}
else if(avg>=40 && avg<60)
{
System.out.print("C");
}
else
{
System.out.print("D");
}
}
}
Trace table
Ste Statement Notes marks[] total avg

p
1 marks[]=int[4]; Initialise the value of
the array size
marks[]=int[4].
? ? ?
2 total=0; Initialise the value of
total=0.
? 0 ?
3 for(i=0;i<4;i++)
{marks[i]={98,84,76,9
4};
Start the for loop and
store the value of
marks[i]={98,84,76,9
4}.
{98,84,76,94} 0 ?
4 total = total + marks[i]; Calculate the value of
total by the equation
of
total=total+marks[i].
{98,84,76,94} 352 ?
5 avg = total/4; Calculate the value of
avg=total/4.
{98,84,76,94} 352 88
6 if(avg>=80)
{ System.out.print("A"
);}
if (avg>=80) then
System.out.print("A");
}