Segmentation calculation residents water bills

Segmentation calculation residents water bills

To encourage residents to save water, water companies take measures according to water usage pricing ladder, the residents water bills payable y (yuan) monthly water consumption associated with x (t): when x is not more than 15 t, y = 4x / 3 ; after over, y = 2.5x-17.5. Please write a program to achieve the calculation of water charges.

Input format:
input given nonnegative real number x in a row.

Output format:
the water line of output payable, accurate to 2 decimal places.

Input Example 1:
12 is

Output Sample 1:
16.00

Input Sample 2:
16

Output Sample 2:
22.50
Java

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
         int x;
		    double y;
		    Scanner reader =new Scanner(System.in);
		    x=reader.nextInt();
			if(x<15)
				y=4*x/3.0;
			else
				y=(float) (2.5*x-17.5); 
				System.out.printf("%.2f",y);
    }
}

c language

#include<stdio.h>
int main()
{
    int x;
    double y;
	scanf("%d",&x);
	if(x<15)
		y=4*x/3;
	else
		y=2.5*x-17.5; 
		printf("%.2f",y);
    return 0;
}