2 like 0 dislike
13.9k 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 | 13.9k 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:172.71.254.192
©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
| 5.6k 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
| 8.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users