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