0 like 0 dislike
6.6k 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

 

[Exam] asked in Midterm by (12.1k points)
ID: 36751 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 6.6k 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:172.71.120.164
©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
| 10.1k 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
| 16.3k 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
| 4.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users