2 like 0 dislike
14k 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 | 14k 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:108.162.241.185
©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
| 8.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users