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