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