0 like 0 dislike
5.1k 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

 

[Exam] asked in Midterm by (12.1k points)
ID: 36751 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 5.1k views

26 Answers

0 like 0 dislike
Hidden content!
#include<stdio.h>
int main(void)
{
* ****** * * a,b,c,d,e,f,g,h,i,j,k,l,m;
* * * *** ** ***** ** ** *** ** * * ** * * ***** * ** * *** * **** ******* * * * * * * * *** * ** * **** * * ** * * *

* * ** **** ** * * * * * check,sum;
*** * *** ** ** * * ** * ** * ** * *
* * * **** * *** * ** ** *** ** ***
    

* * ** * * * * ** ** ****
*** ** * ******* * * * * *
* ***** ** ** * ** * *** * * * *
    }

*** *** * * * * *** ****** if(check != m)
** ** * * * * * ***
** * * *** *** ** * ***** *** ***** *** ** *** ** ISBN");
** * * * *** * ***
**** ** * ** *
* * * * *** * * * **
* ** *** * * ** * *** * * ** ****** * * * * * ISBN");
** * * ** * ** *** **** *****
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include<stdio.h>
int main(void)
{
*** ** ** **** ** * ** * * a,b,c,d,e,f,g,h,i,j,k,l,m;
* * * * * ** * ****** * * * * * *** * * *** *** * *** ** ****** * ** **** *** ****** *** ** * * *** * * *** * ** * ** * * ** *** ****

**** * *** * ****** * ** * check,sum;
*** ******** * *** * ******* * * * ** *
** * * * * ***** * ** * *
    


***** * * * ** ** *** != m)
******* ** ** ** ** ***
***** * ** *** *** * * * ** * * ** ** * * ** * *** ***** ISBN");
* ** * *** * *** *** * *
* * ** ** * **** ** * *
** ** ** * * * **
*** * *** ** ** **** * * * * ******* * ** ISBN");
* * ***** ** **** *** ***
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
* * ***** ** *
*** * **** * **

int main()
{
* *** ** ** * ** *** ** * a noob.\nI forgot **** * ******
* * **** * * * * * **** 0;
}
answered by (-108 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
* ** * ***** ** **
int main()
{
int * * ** ** * * * ** *
* ***** *** ** ** ** *** ***** * **** * * * * ***** * ****** *** * ** * * * **** ** ** ** * *** **** * * * * ** * ** * **
* *** * ** * **
check=10-sum%10;
* * * ** ** ** *** * ISBN");
else * * * * *** ** ISBN");
return 0;
}
answered by (-32 points)
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
0 like 0 dislike
Hidden content!
#include<stdio.h>
int main()
{
* * * * * ***** * ** a[13],i,j;
***** *** * * * * * * * * ** *
** * **** *
** ** * *** * ** ** ** *** * * * ** ***** * ** * * ** * ** * *
    }
* *** ** * ** ** * *** * *** * ** ** * ** * * * * * ****
* * * ** * * ** ** * * * **** * *
    {
* ** * * * * * ** * * ** **** * ** **** **** ** **** *** ISBN");
* * * ********* * * ****
******* * **** ** ***
* *** ***** * ******
**** ** **** ** * * *** * * **** ** * ** * * * *** ISBN");
* * * * ** ***** ** ****
}
answered by (-255 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
0 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,sum=0,check=0;
* * **** * ** ** ** ** ** ** **** * * * * ***** **** ** ** ***** * ** * * * *** ** * * *** ** *** * * *** ** ** *
** * * * * * * ** * ** * ** * *
*** ******** ****** *** ** *

* * * ** * * *** * * (check==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
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.130.70
©2016-2025

Related questions

1 like 1 dislike
49 answers
[Exam] asked Nov 15, 2017 in Midterm by thopd (12.1k points)
ID: 32706 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 7.9k views
2 like 0 dislike
77 answers
[Exercise] Coding (C) - asked Oct 19, 2017 in Chapter 5: Selection Statements by thopd (12.1k points)
ID: 27667 - Available when: Unlimited - Due to: Unlimited
| 13.1k views
0 like 0 dislike
15 answers
[Exam] asked Dec 9, 2017 in Midterm by thopd (12.1k points)
ID: 36755 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 3.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users