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 (-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:172.70.80.171
©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