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:172.71.255.69
©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