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