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

2 like 0 dislike
13.3k 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 | 13.3k 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:172.69.130.108
©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 | 5.2k 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 | 8.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users