0 like 0 dislike
6.6k 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
| 6.6k 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
| 10.1k 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
| 16.1k 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
| 4.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users