2 like 0 dislike
14k 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 | 14k 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:172.69.6.173
©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
| 5.7k 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