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

2 like 0 dislike
20.8k 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 | 20.8k 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:162.159.115.9
©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 | 8.3k 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 | 13.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users