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

2 like 0 dislike
20.4k 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 | 20.4k 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 | 8.2k 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 | 13.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users