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