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

2 like 0 dislike
21.6k 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 | 21.6k 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:104.23.243.109
©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 | 8.6k 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 | 13.9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users