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:172.70.50.51
©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
| 4.8k views
12,783 questions
183,442 answers
172,219 comments
4,824 users