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