2 like 0 dislike
13.6k 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 | 13.6k 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
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
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
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
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
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
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
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
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
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
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.17.66
©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
| 5.4k 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
| 8.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users