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

2 like 0 dislike
20.8k 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 | 20.8k 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:162.159.115.9
©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 | 8.3k 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 | 13.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users