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()
{
****     * **  *    *   ***   * a;
*** ** **  * *    ***  **   ** **** * *  ** *  ** 
      **  ** * * ***  **    (a<=30)
**   ** **  * * ** ** *   * **  *** ** ** *    *** **   ** **  * *  %.2f",a*0.6+10);
  *    *    *  **  **   *   ****  if (a<=50)
* ***   *  **  **   * *  *** **     *** ******  *  *  * *   *  ** **    **** ****     ***  ***    *    *  
* **   *  * ****  **    ** ***   * if(a<=60)
* ** **** ***   *    *  *  **  **  *** ** *  ****** ****** * %.2f",34+(a-50)*1+10);
  ** *** * ***  * *  **   * *
 *   *    ** ****  **  ****  * ***    **    * *   ***  ** *  ****   ** *   ** * ********   *
   ** ***  *** * *   ** * 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 2

Hidden content!
#include <stdio.h>
int main()
{
*  ** *  ** * ****  *  ****** a;
****  * ***  *****  **** *  *    **  ****     * ** *    
    if (a<=30)
 * *** *    * ***    *  *  *  * ****  *** * *** **    * *   * ** *** ***   *  
***  *** *  *     * ***  *** if (a<=50)
 ***  *   **** *  *  *  * *   *   **  **     *         ***** ***   ****  *  * ** * *  
* *   **     **    *** *** if(a<=60)
   ***  * * ** *  ****   *   ** *     *  *    ****  * ****    *  **  *  * ***  * **   * **** 
    *  *   ***  *  *   ****  
**   *  **** *   ** ** ** *    ****  **   *****    *  *     ***** *  **    ** *   * *** **** 
 *** *  *  ***  * *  **  *   ** 0;
}

Comments

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

Answer 3

Hidden content!
#include <stdio.h>
#include <stdlib.h>

int main()
{
 ** * * * *  ***  * **** x;
  **  **** **********  ******* ***  *    ***  * * *
 * ***    **  *  ** *********** * *    * ****  
*** * **   *    * **** * ****** *   *******   %.2f",x*0.6+10);
*** *  *  **  *  *  ** ***    ***** * **** *** ***    * 
* ****  **  ** ** ** * **** *   * ** ***  *** ** *** ***    * **
 ***  ***** ** ** * **    *   * *  ****  ***   *   *       *
 ** * *** * *** *  ***      ** **     * ****** %.2f",(x-50)*1+44);
****   **     *** * ****** *  * 
***** **   *   ** ****   *    **  * **    *** *  ***** *     ** * **
     * ** ** **   ** *** ** * * *  *  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 4

Hidden content!
#include <stdio.h>
#include   *** * *  ** ****  * 

int main()
{
*  **    **    * ** *** *** a,b=10;
****  * *   ** *** **** ***         ****   **     * 

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

******     ***  * ****** *** * *  if(a<=50)
  ** **     *  * *     *****  * **  ***

*  ** * **** * *******   * * ****  if(a<=60)
* * ** *    ***   **  *** ***** *  * **     *        ****   * *** 

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

 ***** * * *** *   ***   *     *** **    *  * %.2f",b);
return 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 5

Hidden content!
#include <stdio.h>
#include <stdlib.h>

int main()
{
* **  **  **    *      *  * a,b=10;
*** * **  ***** * *    ** *****    * ***** *      * **

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

* *   *** *  * * ** *  **      * if(a<=50)
*** **  ** **   **   * *  * * **   **

**  ******  *  **  * * ** if(a<=60)
*   ***** **********   *   ** * * **       * ***      * *

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

*  * **  **  ** *  *  *** * * **** *** * ** * ****  
return 0;
}

Comments

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

Answer 6

Hidden content!
#include <stdlib.h>

int main()
{
*   *  *** **   *** *** * * *** *  x;
 *  * ***  *      *  ***     ** ****  ***  ** * *  
 *   **        **  **  *  **  * *   *** * ****** ****    ** 

  * * ***** ***   *** **    ***  *   * **    ***     * * **** **   %.2f",x*0.6+10);

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

  * * ******    *** ** **** ** **  ** * * *  * ** *  ** *   * *  %.2f",(x-30)*0.8+28);

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

* *  * * ** **** * *    **    *** ** *  * *      *  ** *   *** * * %.2f",(x-50)*1+44);

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

  ** *** **  **   * * **  *     * * **  * *  **   **   *    **   *  *** *** %.2f",(x-60)*1.2+54);

* *   ** * *    * **       * * *  ** 0;
}

Comments

prog.c: In function 'main':
prog.c:6:5: error: implicit declaration of function 'scanf' [-Werror=implicit-function-declaration]
     scanf("%f",&x);
     ^~~~~
prog.c:6:5: error: incompatible implicit declaration of built-in function 'scanf' [-Werror]
prog.c:6:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:9:9: error: implicit declaration of function 'printf' [-Werror=implicit-function-declaration]
         printf("Cost: %.2f",x*0.6+10);
         ^~~~~~
prog.c:9:9: error: incompatible implicit declaration of built-in function 'printf' [-Werror]
prog.c:9:9: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:13:9: error: incompatible implicit declaration of built-in function 'printf' [-Werror]
         printf("Cost: %.2f",(x-30)*0.8+28);
         ^~~~~~
prog.c:13:9: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:17:9: error: incompatible implicit declaration of built-in function 'printf' [-Werror]
         printf("Cost: %.2f",(x-50)*1+44);
         ^~~~~~
prog.c:17:9: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:21:9: error: incompatible implicit declaration of built-in function 'printf' [-Werror]
         printf("Cost: %.2f",(x-60)*1.2+54);
         ^~~~~~
prog.c:21:9: note: include '<stdio.h>' or provide a declaration of 'printf'
cc1: all warnings being treated as errors

Answer 7

Hidden content!
#include <stdio.h>
int main()
{
*  ****  **  * *  * *   *   ** a,b=10;
  ** **    *** *  * * *  * *** * **  *  **** ****** 
* ******    ***   ** ** * *  * *  *   
  ***   *  *       * * **** *  *** ***  *       
    * ** * ** * *** **    **  ****  if(a<=50)
 **    **  ****  *     ** * *   ****    **  *    *  * ** **
    else if(a<=60)
***   *  ** *** *  * ** *** * * **  * ***       *****  **
    * ****     ** ** * *    
** *  * **   *  *****      *        **   ** * * *    * *  *   * 
   * *  ******* * * ** * **  *   *  * ** **   %.2f",b);
   **  ** * *  ***  *****   *  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 8

Hidden content!
#include <stdio.h>
#include ***  ** * * 

int main()
{
 ****** ** **  ** *  **   **** ** a,b=10;
**** * *     *******     **   * *    *****  *  *  *

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

***  * *  **  *  **  *        * if(a<=50)
**  ****  **       **  *    **  * * *   

 ** **** *  **   *   *** * * * if(a<=60)
* **  **   *** **   *    **** *  *   *  * ***  ** ***  **  

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

* *      *    *         * *  ******  ** * %.2f",b);
return 0;
}

Comments

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

Answer 9

Hidden content!
#include <stdio.h>
#include <stdlib.h>

int main()
{
  * ** **** ****** ******   ** * a,b=10;
 * ****  * ** ***   **    * * ** *   ***   * ***  *** *    

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

* ** * ***   * **  **** ***  if(a<=50)
* * *         **    **    ***    * * *  *

* *  ** * * *****  ***** *  **  * *  if(a<=60)
 *****  *   * * * *** **      *** * ** ** * **   **  ***    * **    

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

 * *   ***  **   * * * * * **       * * *
return 0;
}

Comments

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

Answer 10

Hidden content!
#include <stdio.h>

int main(){

  *****  * *         * *  * a,b,c,d,e;

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

 *     ** ** ** **** ** ***    *   * * * **** *
 * *  **   **  **   **  **** * *  * *** *   ****  * *  * * **** * %.2f",b);}

   *   * *    * ***    ** * * ****  ******* *  * ***** && a>30){
* ****  ***  * * * **  *  ****** *    **** * **      *       ** %.2f",c);}

   *  *     ***  ** * **   ****  **  * *    * * *   ** * ** && a>50){
**  * ** * **  ** * ****** ******   * *   * ******  **   * **** *  %.2f",d);}

* ****** *  ***** ******     *  ***  *  *   **  ***    **** 
**   *  * * *  * *  ***** **           *     * *  * *** * *  * **  *          %.2f",e);}










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