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:172.69.6.173
©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