2 like 0 dislike
11.4k 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 | 11.4k 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:172.69.59.26
©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
| 4.4k 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
| 6.8k views
12,783 questions
183,442 answers
172,219 comments
4,824 users