2 like 0 dislike
13.7k 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 | 13.7k views

77 Answers

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

int main()

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


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

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

   
* *** ** * * * ** * * ** * 0;



}
answered by (-254 points)
0 0
prog.c: In function 'main':
prog.c:11:4: error: this 'else' clause does not guard... [-Werror=misleading-indentation]
    else
    ^~~~
prog.c:14:8: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
        return 0;
        ^~~~~~
cc1: all warnings being treated as errors
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()

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

   if (b12==total)
* * * ** * ** *** * * ** *** * ***** ** * * *** ISBN");

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


* * ** **** * ** *** * * * ** * 0;



}
answered by (-254 points)
0 0
prog.c: In function 'main':
prog.c:9:4: error: this 'else' clause does not guard... [-Werror=misleading-indentation]
    else
    ^~~~
prog.c:12:8: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
        return 0;
        ^~~~~~
cc1: all warnings being treated as errors
0 like 0 dislike
Hidden content!
#include <stdio.h>

int main()

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

   if (b12==total)
* *** ** ** **** * * * ***** * *** * * ****** * * *** ISBN");

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


* ** * ** ** **** *** * * ***** **** * 0;



}
answered by (-254 points)
0 0
prog.c: In function 'main':
prog.c:9:4: error: this 'else' clause does not guard... [-Werror=misleading-indentation]
    else
    ^~~~
prog.c:12:8: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
        return 0;
        ^~~~~~
cc1: all warnings being treated as errors
0 like 0 dislike
Hidden content!
include <stdio.h>
int main()
{
* * * ** * ** * *** * ** **** **** ** * ** **
* * ** * ******** ** *** ** ** *** ** * *** * ** **** * ** * * ***** * * ** **** * *** ** ******* **** *** ** * * ** * ** ** * ** *** *
* ** ** * * * **** * * **** ** **** *** * *** * * ** * *
   if (b12==total)
* * * * ** * * **** **** * ** *** * * *** ** *** * ** ISBN");
   else
*** ** * * ** * ** * * * ***** * * ** * * * **** * ** ISBN");

** ** * ** * ** * * ** ** * * **** * * 0;

}
answered by (-254 points)
0 0
prog.c:1:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
 include <stdio.h>
         ^
1 like 0 dislike
Hidden content!
#include ** * * *
int main()
{
* ** ** * *** * * * ** * * **** ** * *** * *
* *** ***** ** * * ** * * ** * ** **** *** ** * * * * * *** *** * ** * *** * * ****** *** ** * * * * * * * ** * * ***** * * **
* ** * *** * ** ***** sum = ( 1) * (a1+a3+a5+a7+a9+a11);
*** * * *** * ** * ** sum2 =  (3) * **** ** * **
* * *** *** ** * ** * sum3 = sum + sum2;
** * * * ** ****** * ** * check = 10 - (sum3 % 10);
**** *** * ** *** * ** * * ** == a13)  {
*** * * * * *** * * * * * * * * * **** * * * ISBN");}
*** * *** * ** * *** ** *** ** * * *** * * * * * * ** ISBN");}
return 0;
}
answered by (-323 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()
{
** * ** ** * * ** ***** * * * ***

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

*** *** ** = * ** * ** * *** ** * ***** * * * *




** ******* * * (last==checkk)
** ***** *** * * * * * * *** ISBN");
** * * * ***
** * ** * * * * * ******* * * ISBN");

* ****** * ** * 0;

}
answered by (-167 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 main()
{
****** * * **** *** * ** ** * ** *** * * **
* *** **** *** * * **** * ** *** * ** *** * ** ***** * ** **** *** ******** * *** *** *** **** ** ** ** ** * ** * **** *
**** * * ** ** ** sum = ( 1) * (a1+a3+a5+a7+a9+a11);
*** * * * * * * ** * * ** sum2 =  (3) * (a2+a4+a6+a8+a10+a12);
*** * ** * ***** * * * ** sum3 = sum + sum2;
* ******* ** * * *** *** check = 10 - (sum3 % 10);
* * *** * * * * *** *** * == a13)  {
* *** * **** ****** * * ** * * *** ***** * * *** * ******
* * * * * * ** * ***** * **** **** * * **** * * ** * ***** * *** ** * * ****
return 0;
}
answered by (-254 points)
0 0
prog.c: In function 'main':
prog.c:11:16: error: too many arguments for format [-Werror=format-extra-args]
         printf("Valid ISBN",check);}
                ^~~~~~~~~~~~
prog.c:12:22: error: too many arguments for format [-Werror=format-extra-args]
         else {printf("Invalid ISBN",check);}
                      ^~~~~~~~~~~~~~
cc1: all warnings being treated as errors
1 like 0 dislike
Hidden content!
#include<stdio.h>
int main()
{
** * ** * **** *** ***** * ** a,b,c,d,e,f,g,h,i,j,k,l,m;
*** *** * **** * * ** *** * * ** ** *** *** ** *** * * **** ** * * ** * * * * *** ** * ** * ** * * ** ****** ** * ** * ** *

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

** ** *** * * * **** * (m==10-(a+b+c+d+e+f+g+h+i+j+k+l)%10)
*** * *** ** * * * ** ** *
* * **** * ** * **** *** ** * ** * * * * ** ** * ***** ISBN");
     }
** ** ** * * * ***
     {
* * *** * ** ** * * ******* ** *** * ** *** ** * * *** * ISBN");
     }
}
answered by (-214 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 main()
{
* * *** * * ** * * **** ** * **** ** * *** * *
*** * **** ** ******* * * ** * * ** **** * ** * * ** *** * * * * ** * ** * **** *** * * ** * * *** **** ** ** ** ** * * *** ** **** * * **
** *** *** * * ** * sum = ( 1) * (a1+a3+a5+a7+a9+a11);
**** ** * **** * **** ** * sum2 =  (3) * (a2+a4+a6+a8+a10+a12);
* * ****** * ** **** * * * sum3 = sum + sum2;
* ** ** * *** * * * ** check = 10 - (sum3 % 10);
** * * * ***** * *** **** == a13)  {
**** * * ***** * ** * **** * * * * ** **** * ***** ** * *
* * ** **** ******* * ** ** ** ** * **** *** ** *** * * ** *** * *
return 0;
}
answered by (-323 points)
0 0
prog.c: In function 'main':
prog.c:11:16: error: too many arguments for format [-Werror=format-extra-args]
         printf("Valid ISBN",check);}
                ^~~~~~~~~~~~
prog.c:12:22: error: too many arguments for format [-Werror=format-extra-args]
         else {printf("Invalid ISBN",check);}
                      ^~~~~~~~~~~~~~
cc1: all warnings being treated as errors
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:108.162.241.184
©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