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:108.162.216.88
©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