0 like 0 dislike
7.7k 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
| 7.7k 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:104.23.197.95
©2016-2026

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
| 12.6k 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
| 19.3k 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
| 5.8k views
12,783 questions
183,442 answers
172,219 comments
4,824 users