0 like 0 dislike
5.1k 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
| 5.1k 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:108.162.241.185
©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
| 7.9k 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
| 13.1k 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
| 3.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users