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:172.69.59.97
©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