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:172.70.130.50
©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