题解 | #四舍五入#

import java.util.Scanner;

public class Main {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);double d= scanner.nextDouble();

    //write your code here......
    String str = String.valueOf(d);
    int integer = Integer.parseInt(str.split("\\.")[0]);
    int i =str.indexOf(".");  //2
    int j =str.indexOf(".") + 1;  //3
    String index = str.substring(i+1,j+1);
    int decimal = Integer.parseInt(index);
    if(decimal>=5) {
        integer +=1;
    }

    System.out.println(integer);
}

}