0 like 0 dislike
6.9k 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
| 6.9k 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:172.70.80.5
©2016-2026

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
| 10.7k 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
| 17k 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
| 5k views
12,783 questions
183,442 answers
172,219 comments
4,824 users