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

2 like 0 dislike
16.7k 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 | 16.7k 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:108.162.216.240
©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 | 6.7k 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 | 10.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users