2 like 0 dislike
13.7k 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 | 13.7k 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:172.69.17.59
©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
| 5.4k 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
| 8.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users