2 like 0 dislike
13.5k 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 | 13.5k 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:104.23.253.96
©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
| 5.2k 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
| 8.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users