2 like 0 dislike
10.7k 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 | 10.7k 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:108.162.216.93
©2016-2025

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
| 4.2k 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
| 6.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users