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:172.70.126.94
©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