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:172.69.17.23
©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