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

2 like 0 dislike
18.8k 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 | 18.8k 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 | 7.7k 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 | 12.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users