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