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:108.162.241.219
©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