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