四則運算

四則運算，這邊示範加減乘除。

public class first

{

        public static void main(String[] args)

        {              

                int a=10;

                System.out.println("a = "+a);

                System.out.println("a + a"+" = "+(a+a));

                System.out.println("a - a"+" = "+(a-a));

                System.out.println("a * a"+" = "+(a*a));

                System.out.println("a / a"+" = "+(a/a));

        }

}