1 like 1 dislike
13.4k 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: 32706 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 13.4k 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:104.23.243.109
©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
| 8.3k 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
| 20.8k views
12,783 questions
183,442 answers
172,219 comments
4,824 users