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