2 like 0 dislike
10.7k 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 | 10.7k 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:172.69.58.88
©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