0 like 0 dislike
4.2k 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
| 4.2k 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:172.70.100.183
©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
| 6.4k 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
| 10.8k 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
| 3.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users