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

2 like 0 dislike
14.8k 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 | 14.8k 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:172.70.126.8
©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 | 9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users