0 like 0 dislike
6.8k 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
| 6.8k 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:172.71.254.169
©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
| 10.4k 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
| 16.7k 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
| 4.9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users