CJ_Slip_11A

Slip No.11

A) Write a menu driven java program using command line arguments for the following:
1. Addition
2. Subtraction
3. Multiplication
4. Division.


1. Open Notepad.

2. Type the following code:

public class Calculator {

public static void main(String[] args) {
// Ensure the correct number of arguments are provided
if (args.length != 3) {
System.out.println("Usage: java Calculator ");
System.out.println("Operations: add, sub, mul, div");
return;
}

String operation = args[0];
double num1 = Double.parseDouble(args[1]);
double num2 = Double.parseDouble(args[2]);

switch (operation) {
case "add":
System.out.println("Result: " + (num1 + num2));
break;
case "sub":
System.out.println("Result: " + (num1 - num2));
break;
case "mul":
System.out.println("Result: " + (num1 * num2));
break;
case "div":
if (num2 == 0) {
System.out.println("Error: Division by zero is not allowed.");
} else {
System.out.println("Result: " + (num1 / num2));
}
break;
default:
System.out.println("Invalid operation. Please use add, sub, mul, or div.");
break;
}
}

3. Save the file with the name Calculator.java. Make sure to select "All Files" in the "Save as type" dropdown and add the .java extension manually.

4. Open the Command Prompt.

5. Compile the Java program by typing:
javac Calculator.java

6. Run the compiled Java program by typing:
java Calculator add 10 20