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