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