南陽理工OJ第壹題A+B problem 用java編程在eclipse上能運行正確，為什麽在OJ上提交時總是CompileError!

public class Main {

public static void main(String[] args) {

Scanner cin = new Scanner(System.in);

int a = cin.nextInt(), b = cin.nextInt();

System.out.println(a + b);

}

}

用這個試試