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