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:162.159.115.9
©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