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 *** *** *
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:104.23.253.96
©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