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