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:172.70.80.53
©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