取近似值

题目描述

写出一个程序，接受一个正浮点数值，输出该数值的近似整数值。如果小数点后数值大于等于5,向上取整；小于5，则向下取整。

输入描述:

输入一个正浮点数值

输出描述:

输出该数值的近似整数值

import java.util.Scanner;

public class Main{
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext())
        {
            double input = scanner.nextDouble();
            int res = (int)input;
            res = (input - res) >= 0.5 ? res + 1 : res;
            System.out.println(res);
        }
    }
}

import java.util.Scanner;

public class Main{
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext())
        {
            double input = scanner.nextDouble();
            System.out.println(Math.round(input));
        }
    }
}

import java.util.Scanner;

public class Main{
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext())
        {
            double input = scanner.nextDouble();
            System.out.println((int)(input + 0.5));
        }
    }
}