2 like 0 dislike
10.8k 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 | 10.8k 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:172.71.254.236
©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