Exercise
Calculator - switch
Objetive
Write a java program that asks the user for two numbers and an operation to perform on them (+,-,*,x,/) and displays the result of that operation, as in this example:
Enter the first number: 5
Enter the operation: +
Enter the second number: 7
5+7=12
Note: You MUST use 'switch', not 'if'.
Example Code
import java.util.*;
public class Main
{
public static void main(String[] args)
{
int a, b;
char operation;
System.out.print("Enter first number: ");
a = Integer.parseInt(new Scanner(System.in).nextLine());
System.out.print("Enter operation: ");
operation = (char)new Scanner(System.in).nextLine();
System.out.print("Enter second number: ");
b = Integer.parseInt(new Scanner(System.in).nextLine());
switch (operation)
{
case '+':
System.out.printf("%1$s + %2$s = %3$s" + "\r\n", a, b, a + b);
break;
case '-':
System.out.printf("%1$s - %2$s = %3$s" + "\r\n", a, b, a - b);
break;
case 'x':
case '*':
System.out.printf("%1$s * %2$s = %3$s" + "\r\n", a, b, a * b);
break;
case '/':
System.out.printf("%1$s / %2$s = %3$s" + "\r\n", a, b, a / b);
break;
default:
System.out.println("Wrong Character");
break;
}
}
}