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

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

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:172.70.126.66
©2016-2025

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 | 4.2k 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 | 6.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users