0 like 0 dislike
7.3k 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
| 7.3k 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
| 11.5k 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
| 17.9k 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
| 5.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users