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

2 like 0 dislike
10.7k 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 | 10.7k 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:172.70.127.154
©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