2 like 0 dislike
12k 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 | 12k 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:172.69.59.22
©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
| 4.7k 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
| 7.2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users