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:104.23.253.97
©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
| 5.2k 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