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!