关于在线编程做题时的一些规范

import java.util.Scanner;

public class Main {

public static int getIntFromDouble(double a){
return (int)(a+0.5);
}

public static void main(String[] args) {
Scanner in = new Scanner(System.in);
while(in.hasNextDouble()) {
double a = in.nextDouble();
System.out.println(getIntFromDouble(a));
}
}
}

import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
while (in.hasNextInt()) {//注意while处理多个case
int a = in.nextInt();
int b = in.nextInt();
System.out.println(
4000
a + b);
}
}
}