1 like 1 dislike
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

 

[Exam] asked in Midterm by (12.1k points)
ID: 32706 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 8k views

49 Answers

0 like 0 dislike
Hidden content!
#include ** * **** * *
int main (void) {
int check;
int sum;
int flag;
int * *** * * * ***** * *** ** ****
* * *** * * * ** * * ** * **** **** * * ** ** * ** * ** * * * ******** *** * * * *** * ** * * * ** * * * *** ** ** * **** * ** * * * **** * **
*** * ** * * ** *** * * ***** *** ** ** ***** ** * ***
check=10-(sum%10);

if (flag == check){
*** * * * * ** ** * * * * * **** ISBN");}
* * ** * ** * * * ****
*** * **** **** *** * * * ** ****
* ** * ** * * ** * *** ** ** * * * *** * * ** * * ISBN");
* *** ** **** ** * *** ** ** * * ** ** *
 return 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>
#include <stdlib.h>

float main()
{
* *** * * * * * ** * a,b,c,d,e;
* *** * **** ** **** * *** **** ** *
*** * * **** * ** ** *** *
* ** * * *** * ** * ***
* ** * * ***** *** ** * **
* ** * **** * ** *** * ***** **


** * * ** *** **** (a<=30)
*** * * *** * * **** * * * * *** * * * * ** * ***
* ** * ** ** **** * ***** ********* * * * (a>30<=50);
***** * ** * * *** ** **** * * *** ** * * ** * ***** **


    if (a<=50)
* * * * * * * *** * ****** ** * *** ** * * * ** * ** ** *
**** ** ** * **** * * * ** ** * * * (a>50);
* ** *** ** * * **** * **** ** *** * * ** * *** * * * ** **** * **

    if (a<=60)
***** *** * * ** * * * ** **** *** ** ** * * ** ** **** ** *** *** ****
* **** ** * **** *** * ** ** * * * * * ** (a>60);
* * **** * ** ** **** * ** ** * * * **** * ** * * * * * * * * **

* ** * *** * ** * ** ** 0;
}
answered
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<stdio.h>
int main(void)
{
* * * * ** * ** ** ** * * * *** * ** ***** **
* * **** **** * **** ********** * *** * ** ** * * ******** * * *** * **** *** * * ***** ******** ** * ** * ***** ***** *** * ** * * ****

* * ****** * ** ** *** * * * ** **** ***** * * ** ** *******
* *** ****** **** *** ** * * ** * **

* * *** * * **** * * *
    {
* * * ** * *** ** ** ***** ** ** * * ***
    }

** * * * ** * * ** ** ** **
* * *** * * *
* *** *** *** * * * ******** * ** * * ***** * * * ISBN");
***** ******** ***********
*** *** ** * * ** *** * * *
* * ****** * ** *** *
** ****** * * * * *** ** * * * ** * * ** **** * *** * * * * ISBN");
    }
return 0;

}
answered by (-249 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Correct output
Case 3: Correct output
0 like 0 dislike
Hidden content!
#include<stdio.h>
int main(void)
{
* * * * ***** *** * * * **** **** **** * * ** **
***** **** * *** * ** **** * * * *** *** * * *** * ***** *** ** ** ** * * * **** ** **** * * * * ** * * * * * *

** * ** * ** * * ** ** ** * ** * * * *** **
* * ** **** * *** * *** **
    
* ** ** **** ****** * ******** **
*** *** *** ***
* ** * * ** * * ** * * ****** *** * * * ** ** *
* * * ** ******** *

* ********* ** ***** ** *** * **
    {
* ** ** **** * ** **** **** *** *** *** *** ** ISBN");
* * * ** * *** *
****** * * *** ** **
    {
* *** * **** **** * * *** * ** * *** **** * * ** * * * * ISBN");
* **** * ** * *
return 0;

}
answered by (-249 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Correct output
Case 3: Correct output
0 like 0 dislike
Hidden content!
#include ***** * **
int main (){
int a,b,sum,sum1,c=10;
** * ***** *** **** **
*** ** * * ** *** *** * ***
do{
* * * ** * * *** * * * ** *
**** ***** *** * * *
* ** * * * * ** ** **
* ** * **** * *** ******** **** ** *
}if(c!==0){
* * **** ** *** * * * * **
sum1=c-sum;
** * ** *** **** **
}
* ** *** **** ** * ** *

return 0;
}
answered by (90 points)
0 0
prog.c: In function 'main':
prog.c:10:12: warning: too many arguments for format [-Wformat-extra-args]
     printf("%d*1+%d*3=",a,b,sum)
            ^~~~~~~~~~~~
prog.c:11:1: error: expected ';' before '}' token
 }if(c!==0){
 ^
prog.c:11:2: error: expected 'while' before 'if'
 }if(c!==0){
  ^~
0 like 0 dislike
Hidden content!
*
answered by (1.1k points)
0 0
prog.c:1:1: error: expected '=', ',', ';', 'asm' or '__attribute__' at end of input
 test
 ^~~~
0 like 0 dislike
Hidden content!
* * **** * * *



int main


int *** * ** *** * * * ** *** * ** * ** **** ** *


** ** * * * * * * * *** * * ** ** ** * ** * **** *** * * ** * ** * ** * ** * * *** ***** ****** * * **

** * + num2*3 + num3*1 + num4*3 + *** + num6*3 + * * + * * + * + * * + **** + * ** *

* * **** *

if *** * ***
* ****** *** * *

* ** *** *** * ** *** *** * *** *

}

else if (check != **

* *** **** *** * * * *** * *** * *




* * 0;
}
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:11:7: warning: too many arguments for format [-Wformat-extra-args]
 scanf("%13d",&num1,&num2,&num3,&num4,&num5,&num6,&num7,&num8,&num9,&num10,&num11,&num12,&num13);
       ^~~~~~
0 like 0 dislike
Hidden content!
* ** ** * * *

int main(void)

{

int ** * *** * * * * * *
** ** * *** **** * ** * ** *** *** * **** * * *** * * * ***** ** ** * * * ** ** * * * ** * * ** * * ***** *** **** **** *
*** *** *** * * * ** ** **

check=10-(i%10);
** **** ** ** ****
* * **** ** ***** * * * ** ISBN");}

  else
****** ** ** * * ** * * * * ** *** ** ISBN");}

return 0;

}
[] - answered by (-32 points)
ID: 33455 - Available when: Unlimited - Due to: Unlimited

edited by
0 1
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include <stdio.h>

int main()
{
   long whole=0;
** * * * * ** *** * isbn;
* * * * ** * * * * *** * *** ** &isbn);
* * * * ** *** * * n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,n13;

** * * * ** * **** ** * *** ** **
** * ** * * ** * **** ** ****
* * * * * * * *** ******** * **
* *** * ** * *** * * ** *** *** **** **
******* * ** *** ** ** * * * ** ** *
* ** * * * * * *** ** * ** * ** * *
* *** ** * * ** * ** ** *
* *** * * ** *** ** *
* *** * * * ***** * *** **
** * ** * * * * * * ** * * *
*** * * * *** ** ** **** *** **
* * * * ** **** * ** * * * *
* * * * * ** * ** ** * ***
whole = ** * * ** * ** *** ** * ** * * * * ** * * * **

printf("%ld", whole);
if (10-(whole%10)==n13)
*** *** ** * * * * * * ** ** ISBN");
    }
* * ****** ** ** ** ** *
** * ** *** ***** * ** ** * * * ISBN");
** * * **** * * * * ** ** * **

**** ** * ** *** * 0;
}
answered by (323 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 <stdio.h>

int main()
{
   long whole=0;
* *** ** * ** ** isbn;
* ** ***** *** ** * ** ** ** * &isbn);
* * * * * * ** *** * * * * * n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,n13;

*** *** * ** ****** *** * *
* ** * ** * *** ** * ** ** ** **** * *
*** **** ** ** * * * * * ***
****** * * **** * * ** *** *** * * *** ** *
**** ** * * ** ** * ** * **** * ** * **
* ** * * **** *** ** * * *** **
******* ** * * * *** * * * * *** * * ***
* ** * * ** ** * * ** * ***** ***
* * *** ** ** ******* ** **
* ** ** ** * ** * * * **
* ** *** * * *** * * ********** **
*** * ** * * * ****** ****
* * * ** **** ****** * * * * *
whole = * * ** ** *** * ** * * ** * *** * * ** **** * *** **
if (10-(whole%10)==n13)
* * ** * ** * *** * **** * ISBN");
    }
* *** * * ** * * * ** ***
*** **** * **** * * ** **** * ** * ** **** ISBN");
* * *** * ** * ***** **

* * ***** ** **** * * * * ** *** * * 0;
}
answered by (323 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:141.101.69.47
©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
| 5.1k views
2 like 0 dislike
77 answers
[Exercise] Coding (C) - asked Oct 19, 2017 in Chapter 5: Selection Statements by thopd (12.1k points)
ID: 27667 - Available when: Unlimited - Due to: Unlimited
| 13.2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users