2 like 0 dislike
16.9k 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 | 16.9k 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:172.69.130.93
©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
| 6.9k 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
| 10.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users