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