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