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

2 like 0 dislike
20.2k 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 | 20.2k 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: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 | 8.1k 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 | 13k views
12,783 questions
183,442 answers
172,219 comments
4,824 users