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

2 like 0 dislike
16.3k 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 | 16.3k 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:172.70.131.201
©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 | 6.6k 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 | 10.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users