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:172.70.100.100
©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