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

2 like 0 dislike
10.8k 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 | 10.8k 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:172.70.126.133
©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 | 4.2k 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 | 6.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users