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