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:172.69.214.175
©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