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

2 like 0 dislike
10.2k 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 | 10.2k 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:108.162.216.89
©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 | 3.9k 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 | 6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users