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:108.162.216.14
©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