2 like 0 dislike
19.4k 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 | 19.4k 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:104.23.197.95
©2016-2026

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
| 7.8k 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
| 12.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users