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:172.70.127.115
©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