2 like 0 dislike
13.7k 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 | 13.7k 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
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:108.162.241.33
©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
| 8.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users