10-12 Exercise: A water supply company

Question

A water supply company charges the water consumption, as follows:

a) Fixed amount of 10$.
b) For the first 30 cubic meters 0.6$/meter.
c) For the next 20 cubic meters 0.8$/meter.  
d) For the next 10 cubic meters 1$/meter.  
e) For every additional meter 1.2$/meter.   

Write a program that reads the water consumption in cubic meters and displays the bill.
寫一個輸入水的用量 輸出水費的程式

Example Input:

25

Output:

Cost: 25.00

Example Input 2:

44

Output:

Cost: 39.20

Example Input 3:
 

75

Output:

Cost: 72.00

 

Answer 1

Hidden content!
#include  ***  *** **  
#include *    *   ** 

int water_amount;
double price=10;

int main()
{
 *  ** *  * **   ** ***   ** ****      * *** *    * *   * * * *

 **       **      *  *    ****   *****  *****

* **  *       ******* **   ** ** ** ** *    * **  * ** *  = price **    **  ** * 
* *    *  *** **    * *  ****    *    * ** * * *      ***** ****  ** ** **  = water_amount - (water_amount - 60);
** * **   *    *********
***   ***    *  **   ****** ** ** *  ***    ** 

*      * *******  ** ** * *       *   * * ** *  *  ***** = price +(water_amount-50)*1;
* * **   ***  *  ** **  *   ***  ***  * *  **  ****  ** ****  *    = water_amount - (water_amount - 50);
 * *  *  **  ***  * **  *     ** 
* **   * ** ***     * **** *    ***  *   *    ***

 ** * *  ** * **  * **  *** * * ** **  ** ** ** * ** *  = price *** *  * * *  ***
   **  ******  *** *    *     * *    * *  *  ***     *  * *    = water_amount - (water_amount - 30);
* ** ***     **  **** * ** ** 
  ** ****  * *   *     * * *** *  *********** * 

 *  * **   ****   * * *     * **** * **   *   **** *  *   * * = price +(water_amount*0.6);
  *** *  * ****** ****   * *    ** *   * *****   ** *   * * *  * = water_amount - (water_amount - 30)
*******  *  *  *****  *   

   ***  *  ** *  *  *  * * ****** *   *** *      price);
*****   *** **** * *  ** *  ** * 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
Case 4: Wrong output

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Your output is not exactly the same with what the question asks you to do :)
Cost: 25.00

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Thanks!