0 like 0 dislike
5.1k 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
| 5.1k 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:108.162.241.219
©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
| 7.9k 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
| 13.1k 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
| 3.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users