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