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