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