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