2 like 0 dislike
14.1k 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 | 14.1k 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:172.69.130.70
©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
| 5.7k 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
| 8.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users