2 like 0 dislike
10.2k 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 | 10.2k 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:172.69.58.130
©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
| 3.9k 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
| 6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users