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

2 like 0 dislike
10.2k 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 | 10.2k 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:172.70.131.187
©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 | 3.9k 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 | 6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users