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:172.69.17.144
©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