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

2 like 0 dislike
18k 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 | 18k 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:104.23.197.65
©2016-2026

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 | 7.4k 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 | 11.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users