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