牛客Java范例

牛客网华为笔试题通过案例，注意要引入包和输出：
1.

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(a + b);          }      }  }