2 like 0 dislike
10.8k 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 | 10.8k 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:172.71.254.237
©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