0 like 0 dislike
7.7k 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

 

[Exam] asked in Midterm by (12.1k points)
ID: 36751 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 7.7k 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:104.23.197.64
©2016-2026

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
| 12.3k 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
| 19.1k 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
| 5.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users