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import java.util.Scanner;
public class Exam
{
public static void main (String args[])
{
int numberStudent, mark, markAplus = 0, markA = 0, markBplus = 0, markB = 0, markBminus = 0, i;
int markCplus = 0, markC = 0, markCminus = 0, markDplus = 0, markD = 0, markE = 0;
Scanner input = new Scanner(System.in);
System.out.print("Please enter number of students in class: ");
numberStudent = input.nextInt();
for (i= 0;i<numberStudent;i++)
{
System.out.print("Please enter students marks: ");
mark = input.nextInt();
if (mark>=85 && mark <= 100)
{
System.out.println("\tGrade A+");
markAplus++;
}
else if (mark>=80 && mark <= 84)
{
System.out.println("\tGrade A");
markA++;
}
else if (mark>=75 && mark <= 79)
{
System.out.println("\tGrade B+");
markBplus++;
}
else if (mark>=70 && mark <= 74)
{
System.out.println("\tGrade B");
markB++;
}
else if (mark>=65 && mark <= 69)
{
System.out.println("\tGrade B-");
markBminus++;
}
else if (mark>=60 && mark <= 64)
{
System.out.println("\tGrade C+");
markCplus++;
}
else if (mark>=55 && mark <= 59)
{
System.out.println("\tGrade C");
markC++;
}
else if (mark>=50 && mark <= 54)
{
System.out.println("\tGrade C-");
markCminus++;
}
else if (mark>=45 && mark <= 49)
{
System.out.println("\tGrade D+");
markDplus++;
}
else if (mark>=40 && mark <= 44)
{
System.out.println("\tGrade D");
markD++;
}
else
{
System.out.println("\tGrade E");
markE++;
}
}
System.out.println("\tGrade A+: "+markAplus);
System.out.println("\tGrade A: "+markA);
System.out.println("\tGrade B+: "+markBplus);
System.out.println("\tGrade B: "+markB);
System.out.println("\tGrade B-: "+markBminus);
System.out.println("\tGrade C+: "+markCplus);
System.out.println("\tGrade C: "+markC);
System.out.println("\tGrade C-: "+markCminus);
System.out.println("\tGrade D+: "+markDplus);
System.out.println("\tGrade D: "+markD);
System.out.println("\tGrade E: "+markE);
}
}
View Answers
November 14, 2011 at 3:50 PM
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Exam{
double totalMarks;
String grade;
public void setTotalMarks(double totalMarks) {
this.totalMarks = totalMarks;
}
public double getTotalMarks() {
return totalMarks;
}
public void setGrade(String grade) {
this.grade = grade;
}
public String getGrade(){
return grade;
}
public static void main(String[] args) {
JLabel lab=new JLabel("Enter number of students in class: ");
final JTextField text=new JTextField(20);
JButton b=new JButton("Find");
lab.setBounds(10,10,150,20);
text.setBounds(180,10,100,20);
b.setBounds(180,40,100,20);
JFrame f=new JFrame();
f.setLayout(null);
f.add(lab);
f.add(text);
f.add(b);
f.setSize(300,100);
f.setVisible(true);
b.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
int num = Integer.parseInt(text.getText());
Exam data[] = new Exam[num];
for(int a = 0; a < data.length; a++) {
String input=JOptionPane.showInputDialog(null,"Please insert student marks: ");
double marks = Double.parseDouble(input);
while(marks>100||marks<0){
String st=JOptionPane.showInputDialog(null,"Invalid marks! Marks should be in between 0 to 100!");
marks=Double.parseDouble(st);
}
data[a] = new Exam();
data[a].setTotalMarks(marks);
if(marks < 40){
data[a].setGrade("E");
}
if(marks >= 40 && marks <= 44) {
data[a].setGrade("D");
}
if (marks >= 45 && marks <= 49) {
data[a].setGrade("D+");
}
if (marks >= 50 && marks <= 54) {
data[a].setGrade("C-");
}
if (marks >= 55 && marks <= 59) {
data[a].setGrade("C");
}
if (marks >= 60 && marks <= 64) {
data[a].setGrade("C+");
}
if (marks >= 65 && marks <= 69) {
data[a].setGrade("B-");
}
if (marks >= 70 && marks <= 74) {
data[a].setGrade("B");
}
if (marks >= 75 && marks <= 79) {
data[a].setGrade("B+");
}
if (marks >= 80 && marks <= 84) {
data[a].setGrade("A");
}
if (marks >= 85 && marks <= 100) {
data[a].setGrade("A+");
}
}
November 14, 2011 at 3:50 PM
continue..
int markAplus = 0, markA = 0, markBplus = 0, markB = 0, markBminus = 0;
int markCplus = 0, markC = 0, markCminus = 0, markDplus = 0, markD = 0, markE = 0;
for (int i = 0; i < num; i++) {
Exam show = data[i];
String g = show.getGrade();
if (g.equals("A+")) {
markAplus++;
}
if (g.equals("A")) {
markA++;
}
if (g.equals("B+")) {
markBplus++;
}
if (g.equals("B")) {
markB++;
}
if (g.equals("B-")){
markBminus++;
}
if (g.equals("C+")){
markCplus++;
}
if (g.equals("C")){
markC++;
}
if (g.equals("C-")){
markCminus++;
}
if (g.equals("D+")){
markDplus++;
}
if (g.equals("D")){
markD++;
}
if (g.equals("E")){
markE++;
}
}
JOptionPane.showMessageDialog(null,"Number of student getting A+: "+markAplus);
JOptionPane.showMessageDialog(null,"Number of student getting A: "+markA);
JOptionPane.showMessageDialog(null,"Number of student getting B+: "+markBplus);
JOptionPane.showMessageDialog(null,"Number of student getting B: "+markB);
JOptionPane.showMessageDialog(null,"Number of student getting B-:"+markBminus);
JOptionPane.showMessageDialog(null,"Number of student getting C+: "+markCplus);
JOptionPane.showMessageDialog(null,"Number of student getting C: "+markC);
JOptionPane.showMessageDialog(null,"Number of student getting C-: "+markCminus);
JOptionPane.showMessageDialog(null,"Number of student getting D+: "+markDplus);
JOptionPane.showMessageDialog(null,"Number of student getting D: "+markD);
JOptionPane.showMessageDialog(null,"Number of student getting E: "+ markE);
}
});
}
}
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