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

2 like 0 dislike
8.5k 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 | 8.5k 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:172.70.130.47
©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 | 3.2k 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 | 5.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users