0 like 0 dislike
5.4k 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

 

[Exam] asked in Midterm by (12.1k points)
ID: 36751 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 5.4k views

26 Answers

0 like 0 dislike
Hidden content!
#include<stdio.h>
int main(void)
{
*** **** * * * ** *** * ** a,b,c,d,e,f,g,h,i,j,k,l,m;
* * *** * * * ** * * * ** ** ** ***** ** * ** **** ** **** ******* * ** ***** * * * * * * ** * ** * * * ***** ** * * *** * *** ***** * * **

* *** * *** * ** check,sum;
*** **** ******* ** ** * **** ***** * ***** *
***** * ** ** ********** * *** ** * * ** **
* *** **** *** **** ** **

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

    



* * ****** * * * ** * * *** != m)
* ** * * * ** *******
* * * * ***** * ** *** ******* ** ** *** * ISBN");
* * * **** * *** ** **
*** * * *** * *****
*** ** * *** ***
* *** ** ** **** *** **** ** ** ISBN");
    }

return 0;
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int main()
{
   int * * * ** *

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

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

* * *** ** ***** * **
* ** ** * *** ** *** * * * **** ** ISBN");}
* * ** * * *** ***** ** * **
** * **** ***** ********** *** * * ****** * * * * ISBN");
* * **** ** *
* ** ****** * * * ***** *** * 0;
}
answered by (42 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()
{
   int *** * **** * ** * **

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

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

* * * * * *** * * * *
*** *** *** * * * ** * * * * * 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<stdio.h>
int main(void)
{
* * *** ** ** * ** ** ** a,b,c,d,e,f,g,h,i,j,k,l,m;
** *** *** * * * * ** * * ** * * * * * * ** * * * ** * ** * * *** ** **** * * * ***** * *

** * * ** * ***** * * check,sum;
* * ** ** * * ****** ** * * * **** * * **
** *** ** ** * ***** * ******* **** * **
** ** * ***** * * * ** * * *

** * * * *** * **** * * *
* ** *** ** * *****
* ***** *** *** * * * ******* ** *** *
    }



* ** * * * ** * ***** ** != m)
    {
*** ** * * *** **** * * * ** * * *** **** * * ** * * ISBN");
* ** ** * ** * ***
* * ** * * *** **** * ** *
* ** * ** ** * ** *
** * * *** ** *** *** * **** ** ** ** * ****** ISBN");
* * * * * * * ** *

return 0;
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include<stdio.h>
int main(void)
{
** *** ** ** * ** * * * * a,b,c,d,e,f,g,h,i,j,k,l,m;
** * * * ** * * **** * ** ****** * ** ** * * * * ** * * * ** * ** * * * ** * * *** * * ** ** ***** *** **** * **

* ****** * * ** * ** check,sum;
** * ** ** * *** ** * * *** ** ** *** * *
* * ** ** ***** **** * * *** ** * * * * * ***
* * ***** * * *** ** ** * ** ** **

* * * ** * * * ******* **
** * * ** ** ** * **
* * ***** ** * ***** *** * **** ** ** ** *
    }



*** * * * ***** ** * != m)
    {
* *** **** ** ** * * * * * ** *** * * ***** * * * ISBN");
**** * *** * *** *** *
* ** * * * *** *
* **** *** ** *
* **** * * * * ** ** * * ***** * ISBN");
* * ** * * * ** * *

return 0;
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include<stdio.h>
int main(void)
{
** * * ** ** * ** ** * a,b,c,d,e,f,g,h,i,j,k,l,m;
***** * *** *** * ** * ** * **** * **** ** * *** ** * * ***** *** * ** * ** ***** ** ********** * * * * ***** * *** * *** * * * **** ***

* ****** * **** * * * * * check,sum;
* * *** * * * ***** *** ** ** * *** ** *
** *** * ** * ** *** ** * *** ** * *
* * * * ** * * * * ***
    


* ** * * *** ****** ** * *** != m)
* * ** * ** ** **** **
* *** * ** *** * * ** * *** * ***** * **** * *** ISBN");
* *** * * ** * ** ***
* ** ***** * * ** ** *
** ** * ** ******** * *
** * ** * ** ** *** * ** **** *** ** * ISBN");
**** * * ******* ** *
    
return 0;
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include *** * *

int main()
{
* * ** * ** **** * a;
* * * ** **** * ** * * * * * **
****** *** * ** * ** ****** ** ** * *
** *** * * * 0;
}
answered
0 0
prog.c: In function 'main':
prog.c:6:10: warning: too many arguments for format [-Wformat-extra-args]
    scanf("a",&a);
          ^~~
0 like 0 dislike
Hidden content!
#include<stdio.h>
int main(void)
{
****** * * * * ** **** ** a,b,c,d,e,f,g,h,i,j,k,l,m;
* * ** ** ** * ** *** * ** ** *** ** * ** ** *** * ** **** * * ***** **** ** * * *** * * ** ** *** * *** * * ** * *

** *** * ** * * * **** check,sum;
* * *** *** * ** ** * * * * **** ***** *** *
**** ***** *** *** *** ** * * * *
    


****** * * ** * *** * *** != m)
* * * ** **** ** *******
** ** * **** * * ** * ***** * *** * * ***** ** * ** *** ISBN");
** ** ***** **** ****
* * ** ****** ** ** *
* * *** **** ** * *
* ** ** ** * * ** * *** ******** * * ** * ISBN");
*** ** * * ** * * *
* * * ** * * * *** *
return 0;
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include <stdio.h>
#include <stdlib.h>

int main()
{
    int s1,s2,s3,s4,s5,s6,s7,s8,s9,s10,s11,s12,s13;
    int check;
    int sum;

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

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

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

* *** ** ***** * ** ** ** * ***** *** * * *** * (check==s13)
** ** *** * * * *** * ** ** ** **** * **
*** * * * ** * ** *** * ** * * * ** * * ** **** ** *** * * **** * * *** *** * ISBN");
**** * * ********** * ***** ** * * * * * ****
****** *** ** * *** ** * *** ** ****** *** ******
** **** ** **** ** ** * ** * * * **
***** * ** *** ** * * *** **** * ** * *** ** * ** * * **** * ** ISBN");
** * ***** ** *** * ** * ***** * *** * * * ****

}
answered by (-193 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 ** ** *** *
#include ** * * * * **

int main()
{
* **** ** * *** ******** * ** a,b,sum;
*** ** *** ** * * ** ***** ** * * * ******
* *** ** **** * ******* ** * number;
** ** * * * ** ** * **** odd number;
** * * **** *** ** ***** * * *
**** * *** * * * (10-(sum%10)=last number)
******* * ** ** ****** ** * * * ** * * * * ** * *** * * ISBN");
* ** ** **** ** * ** *** *
* ** ** ** ** * * ** **** *** * ** *** ** *** *** *** ISBN");
** ****** * * ** 0;
}
answered by (-108 points)
0 0
prog.c: In function 'main':
prog.c:8:7: error: 'odd' undeclared (first use in this function)
     a=odd number;
       ^~~
prog.c:8:7: note: each undeclared identifier is reported only once for each function it appears in
prog.c:8:11: error: expected ';' before 'number'
     a=odd number;
           ^~~~~~
prog.c:9:7: error: 'not' undeclared (first use in this function)
     b=not odd number;
       ^~~
prog.c:9:11: error: expected ';' before 'odd'
     b=not odd number;
           ^~~
prog.c:10:12: error: lvalue required as left operand of assignment
     a*1+b*2=sum;
            ^
prog.c:11:21: error: 'last' undeclared (first use in this function)
     if (10-(sum%10)=last number)
                     ^~~~
prog.c:11:26: error: expected ')' before 'number'
     if (10-(sum%10)=last number)
                          ^~~~~~
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.214.204
©2016-2025

Related questions

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
| 8.4k views
2 like 0 dislike
77 answers
[Exercise] Coding (C) - asked Oct 19, 2017 in Chapter 5: Selection Statements by thopd (12.1k points)
ID: 27667 - Available when: Unlimited - Due to: Unlimited
| 13.8k views
0 like 0 dislike
15 answers
[Exam] asked Dec 9, 2017 in Midterm by thopd (12.1k points)
ID: 36755 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 3.9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users