2 like 0 dislike
10.7k 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 | 10.7k 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:172.69.59.174
©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