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