0 like 0 dislike
3.7k 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
| 3.7k 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:172.70.126.48
©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
| 5.8k 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
| 9.5k 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
| 2.8k views
12,783 questions
183,442 answers
172,219 comments
4,824 users