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:172.70.131.130
©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