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