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

2 like 0 dislike
14.6k 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 | 14.6k 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:108.162.241.33
©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 | 6k 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 | 8.9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users