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:104.23.197.64
©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
| 12.1k 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
| 18.9k 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
| 5.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users