2 like 0 dislike
11.5k 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 | 11.5k 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:172.70.127.218
©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
| 4.5k 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