0 like 0 dislike
5.2k 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
| 5.2k 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:172.71.194.44
©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
| 8.1k 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
| 13.5k 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
| 3.8k views
12,783 questions
183,442 answers
172,219 comments
4,824 users