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