PAT基础编程题目-7-11 分段计算居民水费

题目详情

题目地址：https://pintia.cn/problem-sets/14/problems/791

解答

C语言版

#include<stdio.h>
int main() {
   
	int x;
	float y;
	scanf("%d", &x);
	if (x <= 15)
		y = 4 * x / 3.0;
	else 
		y = 2.5 * x - 17.5;
	printf("%.2f", y);
	return 0;
}

C++版

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
   
	int x;
	float y;
	cin >> x;
	if (x <= 15)
		y = 4 * x / 3.0;
	else
		y = 2.5 * x - 17.5;
	cout << fixed << setprecision(2) << y;
	return 0;
}

Java版

import java.text.DecimalFormat;
import java.util.Scanner;
public class Main{
   

	public static void main(String[] args) {
   
		int x = 0;
		float y=0;
		Scanner scanner = new Scanner(System.in);
		if (scanner.hasNext()) {
   
			x =scanner.nextInt();
		}
		scanner.close();
		if (x<=15) {
   
			y = (float) (4*x/3.0);
		}else {
   
			y = (float) (2.5*x-17.5);
		}
		DecimalFormat decimalFormat = new DecimalFormat("0.00");
		System.out.println(decimalFormat.format(y));

	}

}

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