5.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。

方法一：

import java.util.Scanner;public class Main{    public static void main(String[] args){        Scanner sc = new Scanner(System.in);        while(sc.hasNext()){            float number = sc.nextFloat();            int num = (int)(number + 0.5);            System.out.println(num);        }    }}

方法二：

import java.util.Scanner;public class Main{    public static void main(String[] args){        Scanner sc = new Scanner(System.in);        while(sc.hasNext()){            float number = sc.nextFloat();            int num = (int)number;            if((number-num>=0.5)&&(number-num)<1){                num++;            }            System.out.println(num);        }    }}