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