2 like 0 dislike
10.8k 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 | 10.8k 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:172.70.126.197
©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