2 like 0 dislike
13.5k 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 | 13.5k 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:172.70.80.171
©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
| 5.2k 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
| 8.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users