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