1 like 1 dislike
12.8k 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: 32706 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 12.8k views

49 Answers

0 like 0 dislike
Hidden content!
#include * ** * * **
int main (void) {
int check;
int sum;
int flag;
int * * * **** * * ** ** * * ** *** * ****
** ** ** **** * ** * **** ***** * ** * * * * **** ** *** * *** *** * *** *** * **** *** *** * * * ***** *** * * **** * * *** * * * *
* * ** * * ** ** *** ** ** ** *** ******* *
check=10-(sum%10);

if (flag == check){
** ***** * ****** ***** ** ** ** * ** ISBN");}
******** ** *** ** * ** *
** ** ** *** * * ** * * * * **
* ****** ** ** *** * * ** * * *** ** * * *** *** ** ISBN");
* * * *** ** ** * * * * **** **
 return 0;
}
answered by (-140 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>
#include <stdlib.h>

float main()
{
* * * ** * * * *** * a,b,c,d,e;
* * * * ** **** * * * **** * * * ** *****
* ** * ** * *** *
** ** *** ***** *** * * * **
*** **** * **** * ** *
** * * * * * * ***


*** * * * **** (a<=30)
* * * ***** **** ** *** **** * ** * **** * **** * ****
* * * **** * *** * ***** * * ** * **** (a>30<=50);
* ******* * *** ** * * ** ** ** * * * * * *** ** * * ** **


    if (a<=50)
* ** *** **** ** ****** * *** * * **** * * * * * ** ** ** **** *
** ***** ** * * * * * ** ** * **** *** (a>50);
** ** **** ** * * * *** ** * * ** ** * ** * **** *** * * * ***** *** * *** *

    if (a<=60)
** ** ** ** ** ******** * * *** * ** * * ** * *** * **** * * * ***
* * ***** ** ** * *** **** * ******** * ** **** (a>60);
* ** * ***** *** ** *** ******* ** * * ** * *** ** ** ** ** **** ***

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

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

** ****** ** * * * **
    {
** ** **** * **** * * * ** * **** * ** ** ** *
    }

* **** * * * **** ** **
* * *** * * * *
* * *** * * * * * ** ** * * ** ** *** *** * * **** *** ISBN");
* * * * * **** * *
* * * * * ** * *
** * * * * * *** ***
** * * * * * * * * * * **** ** * * * ** ** * * * ISBN");
    }
return 0;

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

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

***** ** * * **** **** *** ****
    {
*** ** * *** * * * * *** * **** ***** * * * ** * * *** ISBN");
* * * ** * ** *
**** *** * * * * ** * **
    {
* * ** * ** ** * * * * * *** ** * **** ***** * * * * ISBN");
* ** * **** ****** *
return 0;

}
answered by (-249 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Correct output
Case 3: Correct output
0 like 0 dislike
Hidden content!
#include ** **** * *
int main (){
int a,b,sum,sum1,c=10;
*** ** *** ** *** ***
*** ** * * ***** ** * **
do{
*** ** * ** ****** **
** * * **** ** * * ** *****
* ** ** * * * **
****** ** ** * ** ****** * * *** ** * *
}if(c!==0){
* *** *** ***** * * *
sum1=c-sum;
*** * ** **** * *
}
**** * ** ** *

return 0;
}
answered by (90 points)
0 0
prog.c: In function 'main':
prog.c:10:12: warning: too many arguments for format [-Wformat-extra-args]
     printf("%d*1+%d*3=",a,b,sum)
            ^~~~~~~~~~~~
prog.c:11:1: error: expected ';' before '}' token
 }if(c!==0){
 ^
prog.c:11:2: error: expected 'while' before 'if'
 }if(c!==0){
  ^~
0 like 0 dislike
Hidden content!
**
answered by (1.1k points)
0 0
prog.c:1:1: error: expected '=', ',', ';', 'asm' or '__attribute__' at end of input
 test
 ^~~~
0 like 0 dislike
Hidden content!
** * ** ** *** *



int main ***


int * ****** * ** * ** * * * ** ** * ** *** * * * * **


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

** ** ** + num2*3 + num3*1 + num4*3 + * + num6*3 + * + ***** + + * ** + ** + *

* ****** *

if * * * * *
* * * * * * *****

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

}

else if (check != **

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




* * 0;
}
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:11:7: warning: too many arguments for format [-Wformat-extra-args]
 scanf("%13d",&num1,&num2,&num3,&num4,&num5,&num6,&num7,&num8,&num9,&num10,&num11,&num12,&num13);
       ^~~~~~
0 like 0 dislike
Hidden content!
** ** *** * * *

int main(void)

{

int * *** * * * * ** ** ****
** ******* **** * * * ** ** *** * *** ** ** * * * **** ** * ***** ** ** *** * ** *** * *** * ** * ** * ** ***** ***** *
***** *** * ** * * ******* *

check=10-(i%10);
* * *** ***** *
* * * * * * ** * ** *** * * * ** *** * ISBN");}

  else
*** ***** * * *** *** **** * * * * * *** ISBN");}

return 0;

}
[] - answered by (-32 points)
ID: 33455 - Available when: Unlimited - Due to: Unlimited

edited by
0 1
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include <stdio.h>

int main()
{
   long whole=0;
* ** * ** *** isbn;
**** *** * * ** * *** **** ** &isbn);
* *** * ** ** * * ** * ** *** n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,n13;

* **** ** ** **** * ** * * *
** ****** * ** ** ** **** *** * ***** * *
** * * * * * ***** *** * * ** * * * ** **
** ** *** * ** * **** *** ***
* * **** ** **** *** * **** * **
* * *** *** * * ** * *****
* * **** * * * * *** ** *** *** ***
** * * *** * * **** * * * * *
* **** **** * *** * * * ** * * *
** * *** *** ** * *** * * ** ** ***
* * ** ** ** * * ****** **
** * **** *** ** ********* *** *
* ** ** ** * * **** ** * *** **
whole = *** ** * * * * ** * ** * ***** * **** ***

printf("%ld", whole);
if (10-(whole%10)==n13)
* * * **** ********* * * * ** ** * ISBN");
    }
* ***** * * * * ***
* ** *** *** * **** ** * **** * ** ** * ISBN");
* * * * * *** * ** **

*** * *** * ** * * *** * ** 0;
}
answered by (323 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include <stdio.h>

int main()
{
   long whole=0;
* * * *** * ** * isbn;
** * * ** ** * *** * ** * *** &isbn);
* **** * ** ** ** *** n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,n13;

* *** *** * * ****** * * *** **
** ** * * * *** * ** ** *** * * * ** * * **
* *** * * * * *** * * **** * *
*** **** * * * * * * * * *** ** ** ** *
*** * * * * * * * ** ** ** * **** **
**** ** * * * ** ***** *** * *** ** *
**** ** *** * ** * **** **** *** **
***** ** **** ******* * * ** * * ***
** *** *** ** ** * * ** * **
** * * ** * ** * ** **** *
**** * * * *** * ** ** ** * *
** **** ****** * ** * ** ** ** ****
* ** * * * ****** *** ** ***
whole = *** * **** ** ***** ***** * * * * * **
if (10-(whole%10)==n13)
****** ** * *** *** *** * * **** * * * ISBN");
    }
***** * ** ***** * * * *
* ** * * *** * * ***** * * * *** * *** * ISBN");
* *** *** * * * * * *** * * *

** * ***** * ** ** * 0;
}
answered by (323 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:104.23.243.108
©2016-2026

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
| 7.9k 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
| 19.8k views
12,783 questions
183,442 answers
172,219 comments
4,824 users