2 like 0 dislike
13.4k 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 | 13.4k views

77 Answers

1 like 0 dislike
Hidden content!
#include **** ** * ** *
int main(void)
{
int **** * ******* * * * ,sum, check;

* * * * * ** *** * *** * ** **** * * &i3, ** ** * &i6 ***** * * *** ** * ** * ** * *** ** * ** *

sum * ** ** ****** ** *** ** * **
** *
if * ***
**** * **
* * * * * * ** * ******* **** * *** *** ** ** ** ****

* ** *** * **
else
** ** *** * ** * ** * * * * * ***



return 0;
}
answered by (-304 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)

{


** * * **** * * ** *** * * * ** ** * ***** ** * * *** * * *
* ** * * ** * * check_1,check_2;


*** *** * * ** **** * * ** * * * * * * ** * * *** * * * * ***** ** * * *** * * * **** *** * *** * *** * ** ** * ** ** ** *** * * * * ** ** ** * * * ****** *

** ** **** * ** * **** *** ** ** ****** ** ****** ** * * * ** * ** * ** * ** * ** * ***
* ***** * * *** 10-(check_1%10);

**** * * * * * (check_2 == num13)
** ** ***** ** ** *

** ** ** *** ** * ** ** *** * *** ISBN");
* ** * ** ** ***** *
* * * *** * * * **** **  {

**** * ** ***** **** * * * ** * * ****** * * **** * ISBN");
****** **** ** ****** **


** * ** * * ** * 0;

   }
answered by (-107 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>
#include <stdlib.h>

int main()
{
*** **** * * * ** * * **** ** ** * a,b,c,d,e,f,g,h,i,j,k,l,m,x,y;
* * *** * ****** ** * *** ***** *** * ** *** * ** ** * ** * ** * * * ** ** ** *** * * ** * *** * ** * ** ** ** * ** * * ***
** **** * *** ** * * ** * * *** * **
* * * * * ** * * * 10-(x%10);

* *** * * * * * **** **
* **** * *** * * ***** ** ** ** **** * ****** ****** * * * ISBN");
** ** ** **** ** *
* ** ** * ****** *** *** ** * * * *** **** *** * ** * ISBN");

** * * ***** * * * *** 0;
}
answered by (-255 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(void)

{


*** * * ** ** *** *** *** *** * ** * *** * * ** * ******
* * * *** ** * * last_num, check_1,check_2;


* * * * * **** ** * * * ** *** * *** ** * ******** * ***** *** ** **** **** * * *** *** ** ** ***** * ** * * ** * *** * * ** *** * * ** *

** * * *** ** ** * ** * * ***** ** * *** ** * * * ** * * * *
** * * ** * ********* 10-(check_1%10);

* * * ** * * * * (check_2 == num13)
***** * ** * ** *

* ** * * * ** ** * * * ** ** *** ISBN");
** ** ** * **** * * **
* * ** *** **** **** *  {

* * * * ** * ** * * * * * * ** * *** * * * ISBN");
**** * * * * * * * ** *


**** ** * * * ** * * ***** 0;

   }
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:10:9: error: unused variable 'last_num' [-Werror=unused-variable]
     int last_num, check_1,check_2;
         ^~~~~~~~
cc1: all warnings being treated as errors
1 like 0 dislike
Hidden content!
#include *** **** **
int *** * * ******* *****
int b,c;

int main()
{
****** * *** *** ** * *** * ***** ** * * ** ** * ** ** * **** * *** * ** **** ** **** *** *** * * * **** * *** * ** * * *

* ** *** * * * ** *

b=b%10;

c=10-b;


if (c==a13)
*** ** *** *** * * * * *** *** *** * **** *
else
* * * * * * ***** *** * *** * *

return 0;

}
answered by (-336 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>
#include <stdlib.h>

int main()
{
*** * *** * * * * a,b,c,d,e,f,g,h,i,j,k,l,m,x,y;

* ** ** * * ** * *** *** * * ** * * *** ** ** * * ** *** *** * * * **** * ** **** * ** *** **** *** ** * * ** ** ** ** ** * * *

**** * * *** * * *** * ** * ** ******** *****
* * * **** ** ****** * **** ***

* * * **** * ** * **** (y==m)
* ** * **** * *** * ** * ** ** **** * * * * ISBN");
* * **** * * * ** * * *
* * ** * * ** **** ** * * ISBN");

* ** * ** ** **** *** 0;
}
answered by (-127 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 **** * * ****
int * * *** * * ** * **
int b,c;

int main()
{
* ***** * ** * * * *** ** * * * * * * * ** ***** * * ** * ** ***** ** *** * * ***** * * ***

* ****** * **** * *** ** *****
* ** *** * * **
b=b%10;
* ** *** ** ** *
c=10-b;
* *** * *** * * ***** *
** * **** **

if (c==a13)
* * ** *** *** ***** * **** ISBN");
else
** * ***** ** * **** ** ** * *** ISBN");

return 0;

}
answered by (-336 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 ** **** **

int main()
{
 int * ** * ** ***
* * * ** * ** ****** *** * ** *** * ** *** * *** **** *** ****** * *** ** * * ** **** **** ** * * ** * * * * ***** ** **
* *** *** ***** * **
if (i == 10-h)
{
*** * ** * * * ** ***** * *** ***** *
}
else
{
** ***** * * * * ** ** * ** ** * ISBN");
}
}
answered by (-229 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() {
* * ** * * ** * a[13], i, b=0, c;
* *** ** * *** ** ** * i<13; i++) {
* * * * * ** * * *** * * ** ** **** * ** * *** * * * * * **** &a[i]);
* * ** *** * * * * *
** ** ** *** ** ** ** * **** * ** * * * * *********** *** ***
** ** ***** ** * * **
****** ** * ** ** * * ** *** {
***** * * * ****** **** * * ** ** ** *** * * ** ISBN");
** ** ** * * * *
* * ** *** * **** * * * ** * * {
* * ** **** *** ** * * * ** * ** * * ** ** ** * ** ** * ** ISBN");
* * ** ** ** * **** *
}
answered
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()
{
** * * ** * ** * ** *** * ** * ** ** *** * * *

* ****** ** * * ***** ** * * ** ** * **** *** * * * * **** ** *** * *** * ** * **** * **** *** * *** ** * * * *** *
   // * * ** * ** * * ** * *** ** ** * * *** * * ***** ** *
* * * * * * * ** ** **** * * ** ***
*** *** ** ** * *** * *** * ***

   // printf("%d %d",total,check1);
    if (check1==check2)
* ** ** * ** * ** * * * **** ** ** * *
** ** * ** * * * *** ** ** * * * ** **** * ** * ISBN");
** *** * ****** ** * * * **** * *** * ** *
* ** ** ** ** * ** *
** * * * * * * * * * * * ** ** ** *
*** * **** * * * * *** * * *** ***** ** *** * ** * *** ********* ISBN");
* ** **** ** ** * ** ** ** * *** * ** * * **
* **** * ** * ** * * * ** ** 0;
}
answered by (54 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.70.80.212
©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