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!