0 like 0 dislike
5.7k 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
| 5.7k 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:172.70.131.150
©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
| 8.6k 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
| 14k 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
| 4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users