2 like 0 dislike
20.8k 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

 

[Exercise] Coding (C) - asked in Chapter 5: Selection Statements by (12.1k points)
ID: 27667 - Available when: Unlimited - Due to: Unlimited

edited by | 20.8k views

77 Answers

1 like 0 dislike
Hidden content!
#include <stdio.h>
#include <stdlib.h>

int main()
{
** * ** * ** * * * * a,b,c,d,e,f,g,h,i,j,k,l,m,x,y;
* ** **** * ** ** * ** ** * * ***** * ** *** *** * * * * ** * ** ** * ***** * **** ** * ** **** **** ** * * * ******* ** * ****
* ** * * * **** ** *** *** ** ***** * * ** ***
* * ** * * *** * * * ** * * ** * **
*** ** *** * * ** ** **** (m==y)
* * *** * ** * ***** * * * **** **** * ** * * ** * ** *** ** ISBN");
* * * *** * *** **
* * *********** **** * ** *** ** * *** * ** * ISBN");
* * ** * *** * ** ***** 0;
}
answered by (-284 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
1 like 0 dislike
Hidden content!
#include <stdio.h>
#include <stdlib.h>

int main()
{
* * ** ** ** **** *** * a,b,c,d,e,f,g,h,i,j,k,l,m,x,y;
** **** ** * * * **** **** * * ** * * ** ** * * * * * ** *** * * ****** **** *** ******* ** * ** ** ** ** * * **** * ** ** *
* ** * *** ** *** *** ***** *** * ** *
***** ****** * *** ** * * ** *
* * * *** ** * * * ******* (m==y)
**** * ******** * ** * * * *** * * *** * ** * * ***** * * ISBN");
*** *** * ** ** ** *
*** ** ** ** ** ****** ** * ** ****** * *** ** *** * * ISBN");
*** ****** * * ** * * 0;
}
answered by (-108 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
1 like 0 dislike
Hidden content!
#include <stdio.h>
int main()
{
   int * * ** * ** *** * * * * ** *** * *** *** ** ** ** * * * * **
* * ** * *** ** *** ** * ** * * * * * * **** * * * * ** ** ********** * * * * * * ** * **** * **** * ***** * * * ***** * * * *
* * * ** * ** * = ** ** *** *** * ***** * ** * * * * ***** * * ** ****
*** *** *** * * * *** * * * *** = 10-(product%10);
*** * **** * * * (check_digit == thirteenth)
    {
* * * * * * *** * * * * *** ** * * * * ** * ** * ISBN");
*** * * *** ***** ** ***
** * * ** ** * **** **
* *** * ** ***
** * * ** * * **** * *** * *** *** ** ** * ISBN");
* ** ****** *** * ***
* * * * * 0;
}
answered by (-281 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
1 like 0 dislike
Hidden content!
#include<stdio.h>

int main(){
****** *** * * **** * a,sum=0,c;
* ** * * *** * **** * i;
* * * *** **** * ** * ** *
*** ** ** * * *** * ** * *** ** * * * * * **** ** * ** ** **
** ** ** ** ** **** ** * * *** * ** * *** ** **** ** sum+=a;
** * ** * * ** * * * * * ** * ****** ** * sum+=3*a;
***** ** * * **
* * ** * ** ** ** * * * * ** *** * *** * *

**** * * * **** **** * * * printf("Valid ISBN");
****** * * *** ** * * printf("Invalid ISBN");

* *** ** * ***** ** 0;
}
answered by (-116 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
1 like 0 dislike
Hidden content!
#include <stdio.h>
int main()
{
* ** * * ** * **** * ** * * ** * ** ** * * *
* * ******** * **** * ***** ** * * * ** * * * ** * * * **** * * * * ** ** **** * * * * ** * *** * ** * ** * ** * * *** *
* * * ** * * ** * *** ** ** * ** ** * * * ** *
* *** * * ** * ** * ** * = 10 - (sum % 10);
**** * * ** *** * * * (i13 == check_digit)
** * * * ** ** ** **** * ***** * ** * * *** *** ** ** * ISBN");
** * * *** * * *** * *
******** ** * *** *** * ** ** ** * * * * * ** * ** *** *** ISBN");
*** *** ** ** * * ** 0;
    }
answered by (-196 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()
{
* *** ** ***** *** * * ** **** ** * * * * **** ** ***** * * *
* ** * ** *** *** ** * * ** * * *** ** ** * * ** * ** * * **** * * * ** *** ***** ** *** * ** * *** ** * ** * *** * * * ** ***** ***
* * * * * ** * *** * * ** *** * ******* ** * **
** * ** * * * ******* ** ** * = 10 - (sum % 10);
********* ****** ** * (i13 == check_digit)
* * * ** * *** ***** * ** *** ****** ISBN");
* ** * * ** ** *** **
* ** * *** * * ** * ** * *** * * * * *** ***** ISBN");
* ** * * ***** * * ** *** *** 0;
    }
answered by (-196 points)
0 0
prog.c: In function 'main':
prog.c:4:9: error: unused variable 'd' [-Werror=unused-variable]
     int d,i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12,i13,check_digit,sum;
         ^
cc1: all warnings being treated as errors
1 like 0 dislike
Hidden content!
#include<stdio.h>

int main() {
* * ** **** * * ******* a[12], i, b=0;
* *** * **** * ** * * i<12; i++) {
** * **** * ** * * ** * ** ***** **** ** * * * * ** * * ** * **** &a[i]);
* * ** * * ** * *** ***
*** * ** * * ** * ** i<=10; i=i+2) {
* * * * **** ** * **** * ** **** * * *** ***
* * ** * * *** *
* * * * * * * ** i<=11; i=i+2) {
* * * ***** * *** * * ***** * ** ***** * *
** * * * *** ** * ** * *
** * **** * * * * ** **** ** ** {
* *** * ** ** * * * * * *** *** * * * ** ISBN");
*** * ** * ** *** * else {
*** * *** *** ** ** * *** ****** ** **** * * * ****** * * * *** ** ISBN");
** ** ** * ** * * **
}
answered
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Correct output
Case 3: Correct output
0 like 0 dislike
Hidden content!
**** **** *****
** * ** **** ** *

int ***
{
* * * *** * * * n1, n2, n3, n4, n5, n6, n7, n8, n9, n10, n11, n12, n13, s;

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

*** ** *** * * * = n1 + 3*n2 + n3 + 3*n4 + n5 + 3*n6 + n7 + 3*n8 + n9 + 3*n10 + n11 + *

**** * * *** ** * ** **** * = 10 - (s % 10);

* *** * * ** ** * * ** == n13)
**** ** * * ** * *** * ** * * * * ** * * ***** * *** ***
* ** ***** * ** ***
* *** * * * * * * **** *** ***** *** ** * ****** * ** * * * * * *

* ** * * * **** ** **** 0;
}
answered by (129 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() {
* ** ** * * * * * ** a[12], i, b=0, c;
* *** ** *** * ******* * i<12; i++) {
** *** ***** **** ** ****** * ** * * * * ***** ** * ** &a[i]);
*** * *** *** * * * ** **
* * *** * * ***** * * * ** i<=10; i=i+2) {
* * * ** * * ** * * ** * *** * * **
* * * * *** * ***
*** * * ********** **** * ** * i<=11; i=i+2) {
* * *** * ** *** *** **** ** ** ** ** * * *
* * ** ** ** *********
* ** *** * * * *** * * ** * * ** {
*** * *** * * * ** * ** * *** ******* ** ** * * * * * ISBN");
** * * * *** ** * ** * ** else {
* ** * ** ** **** * ***** * * *** * ** * **** * * ISBN");
****** ** *** * *
}
answered
0 0
prog.c: In function 'main':
prog.c:4:24: error: unused variable 'c' [-Werror=unused-variable]
     int a[12], i, b=0, c;
                        ^
cc1: all warnings being treated as errors
1 like 0 dislike
Hidden content!
#include *** ** ** * * *

int main()
{
* ***** * * * * a, b, c ,d ,e ,f ,g ,h ,i ,j ,k ,l, m, n;
** * ** ** * ***** * * * * ***** *** ***** * * ** * * &b ** * *** ***** ** ,&f ,&g *** ** **** * ** ,&l * ***
* *** ** * * ** * * * * * * * ** *
** ** * (m==n)
** ** ** **
* * ** ** * * * ***** * * * ** ** ***
******* * *
***** ** ** * **
* * * *** *
** **** ******** **** * ** * * *** * * * * *
** * ****
* ****** * ** * 0;
}
answered by (-66 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:162.159.115.10
©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
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
| 13.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users