10-19 Exercise 1: International Standard Book Number (ISBN)

2 like 0 dislike
15.4k views

The 13-digit International Standard Book Number (ISBN) is a unique code that identifies a book commercially. The last digit is a check digit used for error detection. To calculate its value, each digit of the first twelve digits is alternately multiplied, from left to right, by 1 or 3. The products are summed up and divided by 10. The check digit is the remainder of the division subtracted from 10. If it is 10, it becomes 0. 

ISBN檢查號的計算方法: 前12個數字，奇數項 乘以 1 ， 偶數項乘以 3

For example, assume that the first twelve digits are 978960931961.  

假設號碼前12位是978960931961

(a) (9*1 + 7*3 + 8*1 + 9*3 + 6*1 + 0*3 + 9*1 + 3*3 + 1*1 + 9*3 + 6*1 + 1*3) = 126 

(b) The check digit = 10 – (126 % 10) = 10 – 6 = 4  

檢查號 = 10 - 餘數 = 10 – (126 % 10) = 10 – 6 = 4  

So the valid ISBN is: 9789609319614

Write a program that reads a 13-digit ISBN and checks the last digit to see if it is valid or not. 

寫一個輸入13位ISBN號碼 判斷最後一個數字是否檢查碼即可

#Try 1:

Input:

9789609319614

Output: 

Valid ISBN

 

#Try 2:

Input:

9781482214505

Output: 

Valid ISBN

 

#Try 3:

Input:

9780132936493

Output: 

Invalid ISBN

 

[Exercise] Coding (C) - asked in Chapter 5: Selection Statements by (12.1k points)
ID: 27667 - Available when: Unlimited - Due to: Unlimited
edited by | 15.4k views

77 Answers

1 like 0 dislike 
Hidden content!
#include *  *         ** *
int main(void)
{
int ** * **** *****      ,sum, check;

* **   **** * **    * **  ****   ***  *   *   *  *       &i3, *  ****  ****   *  &i6 *  * * *  *  * * * *** ** ***  * *   * * *    ****  * *** * *

sum * *  *** *  *  ***          * 
 ***  ** *
if * ** * * 
  *  * ****  *
******  * ***  ****** **   ** *  *  **** *  ** *  ***  ** *   

**   ** **  ** 
else
*** *  * ***  ******      * **** ***   **  **  *  



return 0;
}
answered by (-304 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include <stdio.h>


int main(void)

{


**  ** **   * *  **** ** * *    ***  * ***   *      *** * *****   * *    * *  *  * *  
** ** *** ***   * *** ****** check_1,check_2;


 *    ** *****   * *** ***   * ** ** ****  *     ***  *** *   *     * * * *** * *    *   ***  ** ** ** *  * **  * ***  * *** ** * *   ******   **** *  * *****   *  ** *  ** ***

*    *   ** * * * * * *   * **  * * *  ***  ***  *   *  * **   * * *   *    * * ********  *  ** *     ***  
* **       * * *     * **  10-(check_1%10);

 *** *** * *  *   ****  (check_2 == num13)
***  * *    * * * * *  ** 

*** * ***   ***  **** * * *** *  **** **** ISBN");
 * **  *  *  ** ** ** 
   *** **  *  *****   *   * *  *  {

  **  ** **  * ******* * *   *  *********  *  ***** ****   **   *  ** ** ** ISBN");
* * *  **   * ****  *   * ***   


      **  * *  **  ***   0;

   }
answered by (-107 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <stdlib.h>

int main()
{
*   ***   *  ***** * *    **  a,b,c,d,e,f,g,h,i,j,k,l,m,x,y;
** *** *******   **     * ** *** *** ** * ***    **  **** ****   *  * **   * * *  * ****** ***   ****** *  ****** *   **   *     ** ** * * *  ** ***  * **   *   *  ** ***** 
   *        ** *    **    *** **   ****   *     ** *  ** *  * 
**   **    ** ***  *   * *   10-(x%10);

    **  * * **   * **    * *** **  ***
  **** *** * **    *  * *   * ******  *  ****  **** *** * ***  ISBN");
 * *    * *  * **  *** *** * **** 
  *   *    *   *     ** ****  ** *  *  *** *     *  *  *  ** *  * *    ** * *  ISBN");

  ** *******  *    *  ***    **    0;
}
answered by (-255 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>


int main(void)

{


*  **** * *  *    ****** *  **  *  * ****  ****  ** *     *  ***    * * * * 
  *  *  ***   *      **  ** last_num, check_1,check_2;


   ******  *  *         *  ******* *  *   ** **    *    ** ** **  *  *   ** *   ** * * *  * *  * ** ********* * *     *    *    **** *         **** *  ******   **        *  * ***   ** ***** **   *

        ** **  * ** * ****  *** **    ** **** ** * ****     *  ****  ** **** * ***  * *      *   **  * ** * *
 *  *  * * * *  *  ** **    10-(check_1%10);

** *      **     **  * ***  (check_2 == num13)
* **** * *   **** *  ** * ** * 

  *    * **** ***  *  ** * * * ** * *** ISBN");
* * *  ******* *** *    **
      * * *** * ** *  ** *  * * *  {

* *  *  ****  ** *  *  **  ***** ****   **   *  **  * *** ** * **   ISBN");
* *   *  *  ** * * * *  


** ***   *  ** ** *  ** **   0;

   }
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:10:9: error: unused variable 'last_num' [-Werror=unused-variable]
     int last_num, check_1,check_2;
         ^~~~~~~~
cc1: all warnings being treated as errors
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include ** ** * ** ** 
int *  * *   ** * * * **    ****
int b,c;

int main()
{
 *** *       *    * * *********   ** **** *****     * **  **** *  ** ***   *  * ** **  *  **  ** * * ** **** **** * ** ****    * * **  *  ** **  *

* *  ** *** **    *****   * * ** *

b=b%10;

c=10-b;


if (c==a13)
*****  *  **  *  *   * ** ***  *****     ***** **    ***     * 
else
 *      * ** *     ** ****** *  ** * *   *     *

return 0;

}
answered by (-336 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <stdlib.h>

int main()
{
*  *** * ** * ** **    * a,b,c,d,e,f,g,h,i,j,k,l,m,x,y;

*** ***  ****   * *      *********  * *   * * *   ***   *   *  *    * ******    *    * ***    ** ***** *  *   * **   *    *** **  * *  * **     *   ** *     **     **    * 

****  *  **** *  **   * *** * ***    *  * * 
 ** ***** *   *  ****  ** **     ***

  *** *  *  *******   *** (y==m)
 *   *    * **** **** ** * * *  *      ***  * *** * **     ** *  ****** ISBN");
  *  *** * ** ***   ** ** ****      
 * **  * * **        ******* ** * *  *    **  ISBN");

**  ** *** *  **  *** * *** *** 0;
}
answered by (-127 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include *  *   ***  ***
int  *** **** ** ** *  * * ***  *
int b,c;

int main()
{
* *  ******* **  **   *  * *****   **    * **** ****      * *  *   *** * *****  * ** ***  * ** **  *  * ** **  **   *****   * *** ***    * *     ****

  ******   *   * *   *  ** *    **
***    * ***      **** **
b=b%10;
 ** ** ******* ***    
c=10-b;
* ***  *    * **** **  *
***    *  * **  **  **    

if (c==a13)
*  ***** *  * *   *****  ** * *** ***  ISBN");
else
****  *   **        * **** ** * * * **    **  ISBN");

return 0;

}
answered by (-336 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include **  ****  *** 

int main()
{
 int       ***   *  *
** * * * * *    *    *   *  * *** *   *******     **** **  ** **  **           *  **  * * **** *** * *  **   * ** ***  **   ***   * * * * * *   
 * ** * *   *** * *   ***     * 
if (i == 10-h)
{
      *      * * *  **   ** **   ****     *  *** 
}
else
{
* ** *     *   *         *       * ** **   *  ISBN");
}
}
answered by (-229 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include<stdio.h>

int main() {
 *     *  *****   * **     a[13], i, b=0, c;
*** *  ***  *  **  * ***  * ***   i<13; i++) {
* ** *  ** * *   * ****  *      *  ***   ****  *****  * * * **** * &a[i]);
* *   *  * *  ***    *  **  * *
 *        * *     *    **    ** **   *** * * *       *** ****** **  ***  *** ***
* *  **     **** *  * *  ***  *** *
*** * *   *** ****** * ** * * *    {
  * * **** ** * *  *** * *  *      * *  *   *  **** ****     ISBN");
        *  ** *** *** *   *
*       *  ** * *******  ** * * {
  **  * * **   *  **  * * *   ** * * **   * *  ***     * *  * * *****  *  ISBN");
**   *   ** *  * * * 
}
answered
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include <stdio.h>

int main()
{
***     * * *   ** *   **  *   *  * *    **      * ** * *  **  *  *  

*  *  *   ***** **  **** *  *** **    **   * ***  * ** * ***     ***   ****   **** *** **   ** ** *  * * **  * *** *      ***** * *   ** *   *  **** * ***  ** *   
   // * *  * *  *     *** *    ** *    * * *  * * *    **  *    ** * *********  
*  **  **  *    * *  ****** ****** *  * *    ** ** 
      **    *      *** *  *  *  ****  **

   // printf("%d %d",total,check1);
    if (check1==check2)
 *   * *** * **  *    ** *** * ***  **** **  **  * *** *
**       *   ****  * *** *   ** * **** * * *      ** ** ** * ISBN");
***  * *   ***  *  ** *    * *   * **     **    *** * *  *
      ** *  *     **   ** **
  * *** ********  *    **** * ** ** ** ***  * ** **** *    *
* * ***     *****  ***   * **     ***   * *** ******* *******  * ** *  ** *    ISBN");
**    ** *   * ********* *  ***  * ***  *  ***  ** *  * * 
*  ***  ** ***   ** *  ** *   * 0;
}
answered by (54 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:162.158.154.59
©2016-2025

Related questions

0 like 0 dislike
26 answers
Midterm Question 2 - Makeup
[Exam] asked Dec 9, 2017 in Midterm by thopd (12.1k points)
ID: 36751 - Available when: 2017-11-15 14:10 - Due to: Unlimited | 6.3k views
1 like 1 dislike
49 answers
Midterm Question 2
[Exam] asked Nov 15, 2017 in Midterm by thopd (12.1k points)
ID: 32706 - Available when: 2017-11-15 14:10 - Due to: Unlimited | 9.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users