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 <stdio.h>
int main (void)
{
  ** *   **  *   *****   ****    a;
 **  * **    ********** *    b;
*       *    ****   * ** ***  * *  ***   **    *  *
** *** *    ** *       *  *** *** **  * * *  **   * ****** **** * * 
*  ********** *   **** *** *  *  * **  ***  ********** * *
    }
 **  *    ***  *****  ** *    ****  *****   * **   *  * *   
** *  ***** *  ** *      ** * ****    *  * *  **    *****     * 
** ***  * *    *  * *   ** **  
  **     *       * *  **   * * *  ****  * ** ***   * ** *
*  *  * *** *** * *   * *  *  *  * *  ****  ** *   ** *   **
    }
   * ** * * *   * ****     ****  * ** *  
* **  ** *  *  * ** *** * * *    ******  ** *   ** 
    }
**    *   **     ***  **** ****  * **  ** * *
*   ** *  * *  *    * ***   0;
}

Comments

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

Answer 2

Hidden content!
#include <stdio.h>
int main()
{
**  *  ** ****    * ** *****     price=10,water;
** *    *  ****    **  * **** *     * *  ***   *   *   * **
*       ** ** * ** **    ***** **  ** *
   * **** ***  *  *** *  *    ** **  * **** ** **** * * * * *   * *  
    }
 ** ***  ****  **  ** *  ** **  *      * ** **    *** *   ** ****        
 * ****  *   **       ***   *    *  * *  * ** *   *   * * *  *  * *** 
    }
*    **  ** *  *  * * * **  ****      ***     **  **   ** *****  *     * 
  ****  **  * * ** * ** *  ****   *** ****       *     ** ***** *   ** **  *  **
    }
**  *   * * * * **** * **     *  if(water>60){
** * ***  **   * **   ** * ** *  * ******  *    **   **      ** **  *** * ** *      *
**  * ** *  **  ***  *  *    *
  *** *   * * * *  * *** *** *** * **  * %.2f",price);
 *  ** **   *** **      *** *  *   0;
}

Comments

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

---

-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Correct output

Answer 3

Hidden content!
#include <stdio.h>
int main()
{
   *  *  *   ** * ** * *******  price=10,water;
  *****  ** ** ****    ***  * ***  ** ** * *      *
**      **  **** *      * **  *   ******** *  ***
  **  * ****  ** ** **    **  ***   *  *       *   * **  *   ** 
    }
 *  *** **   **  ** *  ** *    ****   *   *  *** **** *  *   ****
   ***  *   *** *     ******   *  *       *      * *    *  **   ** * **** 
    }
***  *  ** **   * **    *  *    * ***  * *  *   **  * *** ** *****
**  * *** *   **   **   *****   *** *   **  *  ** *  ***    ** *** ** 
    }
 ** ***** ** *    **  **     *  if(water>60){
***  ****  * *   *** **** ****** * **  *  * * ****     * *** * ****** **    
****  **  *  ****** *****  * 
 *** * **   ** *    ** *    *  *  %.2f",price);
* * *  ** * * **  *  ** * **** 0;
}

Comments

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

Answer 4

Hidden content!
#include <stdio.h>
int main()
{
* ** *   ** *** *** *    ***** price=10,water;
**    ****** ** * ** **  ***      *   *  ** * *  *  * 
*** ** ** * *   **   * * ** **  
* ***     ** *  **   ****   **   ** *** *
   **** * * *  *  * *****    * * **  *  ****  ****  ** *
    }
 **** ***   * **     *  *  *  *   * *  ** *    *    * *   * ***  ***  *
**  *  *  *** * *  ***  **** **     * *  ****  *  * *  **     *** * *  
    }
***** *      * ** **** * *  ** * * *  *  ********  **  *  *   * *** * *
 ******* *  ****** * *** * ***** * ***    ** *    * * ****  *  *        * *   **
*****  ** *  * * * *   *    
 * *  *   ** ***  * **     if(water>60){
*******    **   ***  *** * ** *** **   ****  *   ** ** **** ** * * ** *  ****
    }
 ** ***** ** *    **  **   * **   *     * %.2f",price);
*   *  **   *  ****  *  **   ***  *** 0;
}

Comments

prog.c: In function 'main':
prog.c:6:5: error: statement with no effect [-Werror=unused-value]
     water;
     ^~~~~
cc1: all warnings being treated as errors

Answer 5

Hidden content!
  * *  ****    ** 

   
  *   
 *   *** 

  

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


*
 *** *   *   

* ** *

  ** *
 
  
 

    ***** **

  * 
 
     



**



 * **  * * *  

 * 

** * 

 

 
*  *  ****  *

* 

  * *

*
**    
*

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

Comments

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

---

-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Correct output

Answer 6

Hidden content!
 * *** ***  *  * ** * *
 
 * *
*   * 
***  * * ***** 



****  *  ** *  ***       


*
* ******   * 

 ***

***  * 
 
 *
 

*  ***  **  **** 

  * 
*
**  



 



* **  ***** *** 

*   * 

  ****

 *

*
* * * ***  *  *

**** 

    

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

Comments

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

Answer 7

Hidden content!
*   *    ******  *  *  
 
**   **** *** ** * *   
**   *
  ***  



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


**   *** ****
 
   

 *  * 

 


 ****    **  

 ** 

 ** 







*** *** ***

** * 

***** 

**


* **  **     * 

****

***  

 *
    *


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

Comments

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

Answer 8

Hidden content!
  ** **  ***  * *****  * *

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

* 

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



 ***  *   ** * **

    * 

**  * 

* 


*  * * ** *     

**

 * **



 



  * ****

 *  

 ** *

* 


** **  * ** *

 **  *
*
***** 

 *
***  

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

**

Comments

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

Answer 9

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

int water_amount;
double price=10;

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

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

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

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

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

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

   **  *    **  **  **** *** *  * **  %2.2f", price);
  ****  *   *  ** **  ******  ** *  0;
}

Comments

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

---

-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Correct output

Answer 10

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