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!