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:172.70.100.39
©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