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