public class DemoScannerSum { public static void main(String[] args) { Scanner sc=new Scanner(System.in); System.out.println("請輸入第一個數字:"); int a=sc.nextInt(); System.out.println("請輸入第二個數字:"); int b= sc.nextInt(); int with=a+b; System.out.println("結果是"+with); } }