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