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