2 like 0 dislike
13.6k 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 | 13.6k 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:172.69.17.66
©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
| 5.4k 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
| 8.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users