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