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