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

2 like 0 dislike
16.2k 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 | 16.2k 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:172.70.50.51
©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 | 6.6k 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 | 10.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users