2 like 0 dislike
10.8k 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

 

[Exercise] Coding (C) - asked in Chapter 5: Selection Statements by (12.1k points)
ID: 27667 - Available when: Unlimited - Due to: Unlimited

edited by | 10.8k views

77 Answers

1 like 0 dislike
Hidden content!
#include ******* ** *
#include * * ** **
int ISBN[13];
int i;
int sum;
int * * * * ** **
int main()
{
** * *** * * *** *** * *** *** ** * ** * ** * ** *** * * * ** * ** **** *** * ********* * ** ** ******* * * * * * ** ** *************** * * ** *
** ***** ** * * **** * * ** ** ******* **** *** ** * * ** * **
** * * * * * * *** ** * = (ISBN[0]*1 + ISBN[1]*3 + ISBN[2]*1 + ISBN[3]*3 + ISBN[4]*1 + ISBN[5]*3 + ISBN[6]*1 + ISBN[7]*3 + ISBN[8]*1 + ISBN[9]*3 + ISBN[10]*1 + ISBN[11]*3);
********* * * ** *** ** * * ***** ** *
* **** ** * * * ** ***** * * ***
* ****** * ** ******* * **** ***** ****** * * * * * ***** * *** * ISBN");
* **** ** * ** ****** ** *** ** * * * ** ISBN");
* ** *** **** ******* * * ** * *** * ** **** * *
*** ** * * * *** *** * ** * ** * ****
** *** *** * ** * *** * * 0;
}
answered by (-286 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>
int main()
{
** * * *** * ** * *** * a,b,c,d,e,f,g,h,i,j,k,l,m,n;
** * * *** * * ** * ** ***** **** * * * * * * * * * *** * ** ** *** * **** ** * ** * * * ** * * * * * * * * * ** ** * * ****** ** *
* ** * * * * **** ** ** ** **** *** ***
**** * ** ** * **
** **** * *** *** **
**** * ** ** ** ** ** * ****** * ** * * * ** ** * ** * ** ISBN");
** ** * ** * ** ** *
** ** ** ** * * ** **
    {
****** ** * **** *** * *** * ** * *** * * *** ** ISBN");
* * * **** **** *
** *** *** ********* 0;
}
answered by (-255 points)
edited by
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong 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 **** ** * ***

int main()
{
* ** *** a, b, c ,d ,e ,f ,g ,h ,i ,j ,k ,l, m, n;
* *** * * ** * *** *** ** * *** * *** ** * * *** * * * *** * ** &b * ***** * * *** * ,&f ,&g * * * ** * * * * ** * ,&l *** *
***** * ** ***** ***** ** * ******* **
**** * * (m==n)
**** * *** * *
** * * * * *** ** * * *** * **
* ** * *
* * ***
* * *** *
* ** * ** ** **** ** *** * * * ** *
** * * * *
*** * * **** 0;
}
answered by (-66 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
1 like 0 dislike
Hidden content!
#include <stdio.h>
int main (void)
{
* *** *** **** * * *** a,b,c,d,e,f,g,h,i,j,k,l,m,n;
* * * * *** * * * * * *** ** * * ** * **** *** * * ** * * * ***** * ** *** *** * *** * ** ***** * ** **
**** ** * ** *** * ** ** ** ** * * ****
** * * **** ** ** (n==m){
* ** ** ** ** *** * * * **** ** * * * * ** *** ISBN");
* ** ** * * * ** * *
****** * * **** * * ** ** {printf("Invalid ISBN");
*** * * * ****** ****
* * ***** * ***** * ******** 0;
}
answered by (-204 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
1 like 0 dislike
Hidden content!
#include<stdio.h>

int main(void){

    long long int a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p;
* *** * *** ** * * * * * ** **
* ** ** * ** * ***** * ** * ***
* **** *** *** ** *** ** * ** ** * **
** * ** ******* * * * * ** ** * ** * *
******** *** **** ** * * * * *
** * *** * * **** ****** **** ** ***
****** * ******* *** * * ** *** *
* *** * *** * * ** ** * * * * **
* * * * * **** *** * * ****
* ** * * * * ** ** ** **
** * ** ** * * ** * ***
* * *** *** ** ** * *** *** **
* * ** ** * * ** *
    n=a%10;

**** * * * *** ** * * ** ** * * ***
*** **** * * * ** * ******* **

* * * * * * *** **** ****** * ** ** * * *** **** ISBN");



*** ** * * * *** * * * * * * * * * ** * * * * ISBN");






return 0;

}
answered by (-301 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
1 like 0 dislike
Hidden content!
#include <stdio.h>

int main ()
{
** ** * * ** * ** ***** **** *** ** ** ** ***** * *
**** * **** ** *** ** **** * **** ** **** * ** * * **** * * * ** * * * **** ***** *** * **** * ** ** *** ** * **** * * * * *** ** * *** ** *

** * * * * ******* * ***** * * * **
* ***** * * * * **** * ** * * * * *
* * ***** ** * ** ** * * * ******
**** ** ** *** * *** *** * *

*** ****** * * ** ** * (check==m)
** **** * * * *** ***
** **** * ** * * * ** * ****** * ** * ** * * * ** * *** * ISBN");
* ** *** **** *
* ** **** * **
    {
* ** ******* ** * * ***** * *** ** ** * **** * * * * ** ISBN");
    }
* * ** *** * *** 0;

}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
0 0
-----------Re-judge-----------
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 ()
{
***** * * *** ****** * *** * * ** *** * **** ***
**** * * * * *** * * *** **** *** * * * **** * * *** **** * *** ** * * ** ** * ***** ** ** * *** * * **** *****

* * * * *** * ** ** *** ***** ** *** **
*** * * * * *** ** ** *
** * * * **** * * ***
* *** * * * * * * * *** * **

*** *** * * *** * * *** ** (check==m)
    {
* * * ** **** ** * ** * ** *** * ** * ***** * ISBN");
* ** ***** * * * *** * * **
* * ** **** *** * ** * ****
    {
* ** * ***** ** * * * * * ** *** * * ** *** ** *** * ISBN");
    }
** * * **** * * ** * 0;

}
answered by (-249 points)
0 0
prog.c: In function 'main':
prog.c:5:58: error: unused variable 'input' [-Werror=unused-variable]
     int a,b,c,d,e,f,g,h,i,j,k,l,m,first,second,sum,check,input;
                                                          ^~~~~
cc1: all warnings being treated as errors
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.59.239
©2016-2025

Related questions

0 like 0 dislike
26 answers
[Exam] asked Dec 9, 2017 in Midterm by thopd (12.1k points)
ID: 36751 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 4.2k views
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
| 6.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users