2 like 0 dislike
13.4k 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 | 13.4k 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:172.70.127.77
©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
| 5.2k 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
| 8.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users