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