2 like 0 dislike
10.7k 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 | 10.7k 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:172.70.179.60
©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
| 4.2k 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
| 6.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users