10-19 Exercise 1: International Standard Book Number (ISBN)

2 like 0 dislike
19.8k 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 | 19.8k views

77 Answers

0 like 0 dislike 
Hidden content!
 **  *   ****  ** * *
int main  * 
{
int **     *  **  *      ***  *

* *   * **    **  ***    *  ****      *   ***   *    ******  * * ****  * ** ******   ****  *  * * ********** ***   *    * * ***  * *** *  *   

* ** *  +  **  + (d3*1) + (d4*3) +   ** + (d6*3) + **** + *** + * ** + * ** * + ***   +    * 

*** ****   **


if **    == 10)
   **  ***** *  *  ******  = 0;

if    * == d13)
*   *   ** * *    ***   *   * * **** * *   ****    *   

else
  **** * ** ***  ***       **   *    * *  * ** *        * *  * 



*** 0;





}
answered by (-249 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include    *****   *  
#include **** ******

int main()
{
  * *    ** * * ***     *  *  *     ** * ********* ******
*  * * ***   *   ** ***  *   ** ******** %1d %1d %1d %1d %1d %1d %1d %1d %1d %1d %1d  *  ***   * * **   * * *  ** ***  * *  *  *  **  **  ** ** ****     * * *** * *** *** ****   **  *     * *
 * *** * * *   *    * ****     + b*3+ c*1 + d*3 + e*1 + f*3 + g*1 + h*3 + i*1 + j*3 + k*1 + l*3;
 **  **        *   *  * **  *  *** ****
 ** **  ****  *  * ***** * * * **
* **  **  *  * ** **   *** *** ** *  **  * *  * * ** *  * * *  **** *** ISBN");
 **  *  *  **     *  * ***   
 * *  **** ****    ****** **  *  **    ******* *     **   *** ** ***  ****  ISBN");
 **      * * *********   *  *** * * 0;
}
answered by (-258 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include ** **** * ** **

int main()
{
 int  * *   **  * ***
* **  ** *** ** *  * *   * ***** *  * * ********  ** * ***** ***  * *  ** * ***   *** **  * * * **  **** * *   *  *****    *  *  ** *  * ** ** * 
* ** * *  **    *   * * *  * * 
if (i == 10-h)
{
 *      ** * * * **  *   * * *   *     ** * **   *
}
else
{
 *** *   **  * *** ******* * **  **   ** * ** ISBN");
}
}
answered by (-329 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include **** **   *   * 
int main()
{
int ** **   *  ***   *
* * **** * **   **   * **  *   *  *  **   ***    **   *  **    *      *    *   *  *   ***      ** * *** *** * * ** ** **   *  *   * ***  ** ***   *
n= *    *****  ***  *   ****** 
if (m == 10 - n)
{
*  *  * ** * * **** * ****
}
else
{

****** *  ***  * *  *    **  
}
}
answered by (-329 points)
0 0
prog.c: In function 'main':
prog.c:5:7: error: too many arguments for format [-Werror=format-extra-args]
 scanf("%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d%1d",&a,&b,&c,&d,&e,&f,&g,&h,&i,&l,&j,&k,&l,&m);
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main(void)
{
*  *      ** ***    ** ** * digit[13];
   * *  **  ******* ****** **  a,d=0;
  *   *   *  *  **  *       ***  *  *  ** **      **  ****  * **  *  **   *  ***  *  ** * *   * **** ** ****   ** ***   * *  *   *  * *  * * * **  **  *  *  *** *** ** * ** ***** ****** *** **** ***  ** *   *     * * **  ** ** *** ******     *   * *

* **** *  ** *  *   * ** ***** * *****    *   *   **    *  * *** *  *  * ***   ********** *     ***  *  

**** *** * *     ** ** *   ** *  *  * * ***** *
 * * *  ** * * ** * ** * *  ** *
 ** *  **  * *   *   ********   
*  ***      ** *** * *  ***    **** *   * ****    ***  * ** ISBN");
    }
 * ** *     * **  *    ** ** *
 **  *****    *     * *   * *** ***
*  *    * *  ****** ** ** **   * *  * ****** ******** *  **   *  * **** ***** * ISBN");
** *   *** * *         *   *
 ***** ** * *** **** ***  *    **  0;
}
answered by (-168 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main(void)
{
* * *** ***** ***     ** * **  digit[13];
         ***    * ***  ***  * i,a,b,c,d=0;
 ***  *  * * *******     *** ***  
*** *  *  ** * **   ** **   **  *  ** *  *  ** ***  * * * * ** ****  *  **   * *** *   *  * *****  **    *  **** ***** ** *   * **  ** *****   *  ***  **  ***** *   ***  *   *** ** * ** *  ***  *       *    **** * *  **  * ****  ****  

    *      *      ** **   *  ** **** *   *  *   *  ********** * * ***     *  * * *** * **   *     **** *    * *

 * * *** * * **      * ***********   *
** * *   *   * ** ** *  ****  * *  * *
    {
  * *  * ** ***   **   *  * **   *   ***  *** *  **  * *  **  ******* *** * ISBN");
    }
    * *    *  * * *    * * ***
*  * *  *** * **  *   *  * *
***  *  *    **    * * *   **  ***** ** *  *  *  *** *    * * *  ***** **  * ISBN");
* ****   *  ** ** * **  
 *** ***** * *    *     * * 0;
}
answered by (-168 points)
0 0
prog.c: In function 'main':
prog.c:7:15: error: unused variable 'c' [-Werror=unused-variable]
     int i,a,b,c,d=0;
               ^
prog.c:7:13: error: variable 'b' set but not used [-Werror=unused-but-set-variable]
     int i,a,b,c,d=0;
             ^
prog.c:7:9: error: variable 'i' set but not used [-Werror=unused-but-set-variable]
     int i,a,b,c,d=0;
         ^
cc1: all warnings being treated as errors
commented by (4.3k points)
1 like 0 dislike
Hidden content!
#include <stdio.h>

#include <stdio.h>

int main()

{
* **** *** *** ** ** ** ** * ** * * * * ** ** * ******
** * * * * * ** * * * * * * * * ** * *** ** * * * * * *** ** *** **** *** * ** * ** * ** *** *** *** ** * ** ** * *** * *
*** ****** ** * * * **** **** ***** ** ** ** * **
** ** ** ** * ** * *** * ** *
** * * * * ** ** *** * * printf("Valid ISBN");
** * * * * ** * * * * **** * ****** ISBN");
***** * ** * *** * * ** * ** 0;

}
answered by (-140 points)
edited by
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
1 like 0 dislike
Hidden content!
#include <stdio.h>

int main()

{
* * ** ***** * *** ** ****** ** * ** * * **** **
**** ** * **** **** * * *** ** *** ** *** * ** ** ** ** ** * * * * ** * ********** ***** * * ** ** *** * * ***** *** * * ** * *** *** *******
* * ** *** ***** *** * ** **** * ** *** * **** *
**** * ** * ** ** * * * * *


****** * *** *** * *****
* *** ** * ** ***** * * *** * *** * * * * * ***** ** ISBN");

    }

   else{
** ** ** ***** ** *** * ** * ** *** ** ** * * * * ISBN");

   }
* * * ** * * ** * *** ****** ***** 0;



}
answered by (-140 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

int main()

{
* ** *** * *** *** **** * * ** *** * * * * ** * *****
* *** **** * * ****** ** **** * ** * ** * ** * * * ****** *** ** * ** *** * * *** **** * * * * * * ** ** ** ** * * ********* * *** * * ** ** ****** * *
* * * ** *** **** ** ** *** **** *** ** **** ** * * * **
* *** ***** * * *** *


*** ***** **** ***** * ***
**** **** ** * * ** * * * **** * * * ** * *** * **** ISBN");

    }

   else{
** **** ** * * * * * ** * * ** * * **** ** ** ISBN");

   }
** ** ** ** * * *** * * ** * ******* * *** * 0;



}
answered by (-140 points)
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

int main()

{
* **** * ***** * * * **** * ** * *** *** * **
* * ** ** * * * * ** ***** ** * * * ***** * * * ** *** **** * * *** * ** * * ** * * * * ****** ** * * ** ******* * * ** **
** ** * * ** **** * ***** * *** * ** * *** * ** ****** ** ** *
** * * * ***** * **** * *


* **** * * * ******* ****
**** * * *** *** ** ***** ** ** ** *** * ** ** * * ISBN");

    }

   else{
* * * **** ** * ** ** * * * ** * * ISBN");

   }
** *** *** ********* * * ** **** ** * ******* 0;



}
answered by (-140 points)
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:104.23.197.64
©2016-2026

Related questions

0 like 0 dislike
26 answers
Midterm Question 2 - Makeup
[Exam] asked Dec 9, 2017 in Midterm by thopd (12.1k points)
ID: 36751 - Available when: 2017-11-15 14:10 - Due to: Unlimited | 7.9k views
1 like 1 dislike
49 answers
Midterm Question 2
[Exam] asked Nov 15, 2017 in Midterm by thopd (12.1k points)
ID: 32706 - Available when: 2017-11-15 14:10 - Due to: Unlimited | 12.8k views
12,783 questions
183,442 answers
172,219 comments
4,824 users