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!