2 like 0 dislike
10.7k 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 | 10.7k 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:172.69.7.253
©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
| 4.2k 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
| 6.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users