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

2 like 0 dislike
20k 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 | 20k 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:104.23.243.108
©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 | 8k 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 | 12.9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users