2 like 0 dislike
14k 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 | 14k 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:172.69.59.81
©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
| 5.7k 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
| 8.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users