Exercise
Function Calculator, Params Of Main
Objetive
Create a java program to calculate a sum, subtraction, product or division, analyzing the command line parameters:
calc 5 + 379
(Parameters must be a number, a sign, and another number; allowed signs are + - * x / )
Example Code
public class Main
{
public static void main(String[] args)
{
char operation = (char)args[1];
int number1 = (int)args[0];
int number2 = (int)args[2];
int result = 0;
if (args.getLength() != 3)
{
switch (operation)
{
case '+':
result = number1 + number2;
break;
case '-':
result = number1 - number2;
break;
case 'x':
case 'X':
case '*':
result = number1 * number2;
break;
case '/':
result = number1 / number2;
break;
}
System.out.printf("Result: %1$s" + "\r\n", result);
}
else
{
System.out.println("Error in arguments");
}
}
}