CODE

---

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class SimpleCalculator extends Application {

    @Override
    public void start(Stage primaryStage) {
        // 1. Create Input Fields
        TextField num1Input = new TextField();
        num1Input.setPromptText("Enter first number");

        TextField num2Input = new TextField();
        num2Input.setPromptText("Enter second number");

        // 2. Create Operation Buttons
        Button btnSum = new Button("Sum (+)");
        Button btnSub = new Button("Sub (-)");
        Button btnMul = new Button("Mul (*)");
        Button btnDiv = new Button("Div (/)");

        // 3. Create Result Label
        Label resultLabel = new Label("Result: ");
        resultLabel.setStyle("-fx-font-size: 14px; -fx-font-weight: bold;");

        // 4. Set up Button Actions
        btnSum.setOnAction(e -> calculate(num1Input, num2Input, resultLabel, "sum"));
        btnSub.setOnAction(e -> calculate(num1Input, num2Input, resultLabel, "sub"));
        btnMul.setOnAction(e -> calculate(num1Input, num2Input, resultLabel, "mul"));
        btnDiv.setOnAction(e -> calculate(num1Input, num2Input, resultLabel, "div"));

        // 5. Arrange Elements in Layouts
        HBox buttonBox = new HBox(10, btnSum, btnSub, btnMul, btnDiv);
        buttonBox.setAlignment(Pos.CENTER);

        VBox root = new VBox(15, num1Input, num2Input, buttonBox, resultLabel);
        root.setPadding(new Insets(20));
        root.setAlignment(Pos.CENTER);

        // 6. Set the Scene and Stage
        Scene scene = new Scene(root, 350, 250);
        primaryStage.setTitle("Simple Calculator");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void calculate(TextField num1Input, TextField num2Input, Label resultLabel, String operation) {
        try {
            double num1 = Double.parseDouble(num1Input.getText());
            double num2 = Double.parseDouble(num2Input.getText());
            double result = 0;

            switch (operation) {
                case "sum": result = num1 + num2; break;
                case "sub": result = num1 - num2; break;
                case "mul": result = num1 * num2; break;
                case "div":
                    if (num2 == 0) {
                        resultLabel.setText("Result: Cannot divide by zero!");
                        return; 
                    }
                    result = num1 / num2;
                    break;
            }
            resultLabel.setText("Result: " + result);
            
        } catch (NumberFormatException e) {
            resultLabel.setText("Result: Please enter valid numbers!");
        }
    }

    public static void main(String[] args) {
        launch(args);
    }
}
            

OUTPUT

---

Simple Calculator

×

Enter first number

Enter second number

Sum (+)

Sub (-)

Mul (*)

Div (/)

Result:

CODE

---

#!/bin/bash
while true; do
    clear
    date +"%T"
    sleep 1
done
            

OUTPUT

---

13:05:50
            

OUTPUT

---

C# IMP is not predictable!!!!
            

Exam | IMP

CODE

---

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class SimpleCalculator extends Application {

    @Override
    public void start(Stage primaryStage) {
        // 1. Create Input Fields
        TextField num1Input = new TextField();
        num1Input.setPromptText("Enter first number");

        TextField num2Input = new TextField();
        num2Input.setPromptText("Enter second number");

        // 2. Create Operation Buttons
        Button btnSum = new Button("Sum (+)");
        Button btnSub = new Button("Sub (-)");
        Button btnMul = new Button("Mul (*)");
        Button btnDiv = new Button("Div (/)");

        // 3. Create Result Label
        Label resultLabel = new Label("Result: ");
        resultLabel.setStyle("-fx-font-size: 14px; -fx-font-weight: bold;");

        // 4. Set up Button Actions
        btnSum.setOnAction(e -> calculate(num1Input, num2Input, resultLabel, "sum"));
        btnSub.setOnAction(e -> calculate(num1Input, num2Input, resultLabel, "sub"));
        btnMul.setOnAction(e -> calculate(num1Input, num2Input, resultLabel, "mul"));
        btnDiv.setOnAction(e -> calculate(num1Input, num2Input, resultLabel, "div"));

        // 5. Arrange Elements in Layouts
        HBox buttonBox = new HBox(10, btnSum, btnSub, btnMul, btnDiv);
        buttonBox.setAlignment(Pos.CENTER);

        VBox root = new VBox(15, num1Input, num2Input, buttonBox, resultLabel);
        root.setPadding(new Insets(20));
        root.setAlignment(Pos.CENTER);

        // 6. Set the Scene and Stage
        Scene scene = new Scene(root, 350, 250);
        primaryStage.setTitle("Simple Calculator");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void calculate(TextField num1Input, TextField num2Input, Label resultLabel, String operation) {
        try {
            double num1 = Double.parseDouble(num1Input.getText());
            double num2 = Double.parseDouble(num2Input.getText());
            double result = 0;

            switch (operation) {
                case "sum": result = num1 + num2; break;
                case "sub": result = num1 - num2; break;
                case "mul": result = num1 * num2; break;
                case "div":
                    if (num2 == 0) {
                        resultLabel.setText("Result: Cannot divide by zero!");
                        return; 
                    }
                    result = num1 / num2;
                    break;
            }
            resultLabel.setText("Result: " + result);
            
        } catch (NumberFormatException e) {
            resultLabel.setText("Result: Please enter valid numbers!");
        }
    }

    public static void main(String[] args) {
        launch(args);
    }
}
            

OUTPUT

---

Simple Calculator

×

Enter first number

Enter second number

Sum (+)

Sub (-)

Mul (*)

Div (/)

Result:

CODE

---

#!/bin/bash
while true; do
    clear
    date +"%T"
    sleep 1
done
            

OUTPUT

---

13:05:50
            

OUTPUT

---

C# IMP is not predictable!!!!