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:104.23.243.108
©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