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

2 like 0 dislike
17.9k 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 | 17.9k 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:162.159.115.31
©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 | 7.4k 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 | 11.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users