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

0 like 0 dislike
Hidden content!
#include <stdio.h>

int main()

{
** * ** ** * ** * ** *** * * * * **** *** ***
*** ** *** * *** ** ** * ** * ** * ** ** ** * ** ** *** * **** *** ***** ** * * ** * **** * ***** ** ** *** ** * **** ** * *** * * * **** ** ****
* * *** ** *** ******* * * *** *** * ** *** * ***
* **** ** * ** ***** * *


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

    }

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

   }
*** ** *** * * * * ***** ** * ** * 0;



}
answered by (-140 points)
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
1 like 0 dislike
Hidden content!
**** *** **


* **

{
******* * * ** ** * * * **** ***


* * ***** * ** *** = 0 ;


* * * * * * ** ** ** %1d %1d %1d %1d %1d * * *** * * * ** *** **** *** * ** * *** * ** **** ** * * *** ****** * **** ** *** **** ** * ** * * * * * ** *


** **** * ** * * = a*1 + * + c*1 + d*3 + e*1 + f*3 + + * + * + * + + *


******* * * ** = 10 - * ** % *


* * **** ** *** * == m )
*** * *** * **** *** * ** * ** *** ***
** * * ***** *
* * ** **** * ** * ******** * * * * ** ** *



}
answered by (-285 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!
** * ** ***** * **


* * **

{
* * ** int * * *** * * ***


** ** ** **** * int ** = 0 ;


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


*** * ** * * * = a*1 + b*3 + c*1 + d*3 + e*1 + * + g*1 + h*3 + i*1 + j*3 + k*1 + *


** * * = 10 - ** % *


*** * * if( **** == m )
* * * * * * * * **** ** ***** ** * * *** * *
** * * * *
* * * *** ** *** * * * * ***** * *** **



}
answered by (-285 points)
0 0
prog.c: In function 'main':
prog.c:9:50: error: format '%d' expects a matching 'int *' argument [-Werror=format=]
  scanf("%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d",&a,&b,&c,&d,&e,&f,&g,&h,&i,&j,&k,&l,&m);
                                                  ^
cc1: all warnings being treated as errors
0 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,n,p;
**** * * **** * * ******** * * * ** * * * ***** * ** * **** * ** ** ** * * * ** *** ** ** * *** *** ** * ** * * * ** ***
* * * * ** * * ** ***** * ** **** ***** **
* * ** * ** * * *** * ** *** * * *
* ** * ** * * ** *
** ** * *** * *** *
* * ** * *** * ** ***** * ** * ** ** *** ******* **** ISBN");

    }
* * ** *** * *** * ***
** * ** * ** * ***
*** *** * **** * *** *** * **** **** * * ** ** * ** ISBN");
* ** *** ** **** * ***
** * **** * **** ** * * ** 0;

}
answered by (-498 points)
0 0
prog.c: In function 'main':
prog.c:10:5: error: suggest parentheses around assignment used as truth value [-Werror=parentheses]
     if(p=m)
     ^~
cc1: all warnings being treated as errors
0 like 0 dislike
Hidden content!
*** * * *** *** * * *


* **

{
**** ******* int ** ** * *


********* * int * = 0 ;


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


**** * * ** = a*1 + b*3 + c*1 + d*3 + e*1 + * + g*1 + h*3 + i*1 + j*3 + k*1 + *


** * * *** * = 10 - * % *


*** **** ** if( ** == m )
*** * * * ** * ** * * * * ** * *** ** * *
* *** * * *
*** ** ** ** * *** * * ** * ** ***



}
answered by (-285 points)
0 0
prog.c: In function 'main':
prog.c:9:50: error: format '%d' expects a matching 'int *' argument [-Werror=format=]
  scanf("%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d",&a,&b,&c,&d,&e,&f,&g,&h,&i,&j,&k,&l,&m);
                                                  ^
cc1: all warnings being treated as errors
0 like 0 dislike
Hidden content!
** ***** * * **


* *

{
* * ** * * int **** ******** ***


**** * ***** int ** = 0 ;


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


**** * ** * ** = a*1 + b*3 + c*1 + d*3 + e*1 + * + g*1 + h*3 + i*1 + j*3 + k*1 + * **


* * * * = 10 - ** % * *


* ** * * if( ** * == m )
** **** *** * * * * * ** ***** ****
* * * * * * * **
* *** ** *** * *** ** * ** ** * *** * **



}
answered by (-285 points)
0 0
prog.c: In function 'main':
prog.c:9:50: error: format '%d' expects a matching 'int *' argument [-Werror=format=]
  scanf("%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d",&a,&b,&c,&d,&e,&f,&g,&h,&i,&j,&k,&l,&m);
                                                  ^
cc1: all warnings being treated as errors
1 like 0 dislike
Hidden content!
#include <stdio.h>

int main()

{
* ***** ** * * ** ** ** **** * * * * ***
* ** ** ** * ** ********* * *** ****** * ** * **** * ** * ** ** * ** *** * * ** ** * * * **** ** * * * * * ** ***** ** ** ***** * ** * *** * * ***** ***
*** * *** ** **** **** ** * * ** * ** * ** * ****** * ** * * * *


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

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

   }
*** * * ** * ** * * * *** * ****** * ** 0;



}
answered by (-254 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()

{
* * * * *** * * **** * ** * * **** * * * ** ** ***
***** * ** * * ** **** *** * ** ***** * * * ***** * * * ** * *** * * ** * ** ** **** * **** * ** * *** **** *** * *
*** * * * * * * * *** * * * * * * * * * **** *


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

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

   }
* ** * **** *** ******** *** * * ** * *** 0;



}
answered by (-254 points)
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>

int main()

{
* * * **** * * ****** **** * * * ***
**** * * * * *** * * * * **** * ** ** * * *** **** ** ** * * *** * * ** *** ** ** ** * *** ***** **** * * ** ***** **
* ****** ** *** * * *** * * ** *** ** ** * ** ** * * **


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

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

   }
* ** * * * ** * * ** ** ******** 0;



}
answered by (-254 points)
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>

int main()

{
** * * ** * * * *** * * * * ** * ** * * * ** * ** *
* ** **** * ** **** * ** * * **** * *** * * * *** * **** ** ** ** *** * **** * ** * * * **** ** *** ** **** * *** * * ** * *** * **** * * **
** ** * ** ** * * * * ******* * * * ** ** * *** ** *


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

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

   }
* ******** ** ** ** * * ** * *** * * 0;



}
answered by (-254 points)
0 0
Case 0: Wrong 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:172.69.17.58
©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