0 like 0 dislike
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

 

[Exam] asked in Midterm by (12.1k points)
ID: 36751 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 7k views

26 Answers

0 like 0 dislike
Hidden content!
#include<stdio.h>

int main(){
    char isbn[12];
    int a,b,c,d,e,f,g,i=0,j;
** ** ** ** * ** *** **** ***** **** ** *
* ** *** ** *** * * ** *** * ** *
* *** **** ** **** * * **** **** * ***** ******* ** ** ***
** ** *** *** * * * * * ** * * *** **
* * * * * *** * *** * *** * * * * *** * *** * * * * * *
*** *** * ** ** * *
** * ****** * * ***
*** *** * * ** **** *** ** **
* * *** * **** ** * * *
* * * ** * **** ** * * *
** ** * * * * * ** *** * * * ****** * ******* * * **** ISBN");
****** *** ** ***** * ** * *
** ******* ** * * * * **** * ***** * ** * *** * *** * * ISBN");

}
answered by (-32 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(){
    char isbn[12];
    int a,b,c,d,e,f,g,i=0,j;
* *** * ** ** * * * ** ** ** * * ** *** * * * * **
* * ** * ***** * * **** *** ***
* * * ** *** * ** * ** * ***** **** * **** ** * **
** ********** * * * * * * * *
* * ** **** * ** * * ** * * * ** * * * * * *
* * * *** * *** * ** **
* ** ******* ** * ** * * ***
*** *** *** ** * **
* * ** *** **** * **
**** * * * * * * **
** *** * ** *** * * * *** * * * * ** * ** * * *** ISBN");
** * ** * **** * ***
* * * * * *** **** * * *** * * * ***** * ***** ***** ** ** ISBN");

}
answered by (-32 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>
#include <string.h>

int main(){
    ///long long int n = 978960931962;

    long long int n;// = 9789609319614;
    int lastDigit;
    int temp1;
    int sum=0;
    int check=0;

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

* ** ** ** * ** ** ** * ** ****** ** = n%10;
** * ******** ** * ** * ****** ** * * ** = n/10;

* * * * **** * * * ** * * * * * **** ** ** * * = n%10;
** * **** * ** *** * * * * ** ** * * **** = temp1*3;
* ** * ** * **** ** ** * ***** *** * * ** = sum + temp1;
******* * *** * **** **** ** ** * * ******** * ", temp1);
******* ** * **** * ********* * * * * = n/10;


** * ** * * * *** **** * *** *** * * ** * = n%10;
**** * *** ** * ** * ********* *** * *** ** * = temp1*1;
* *** ** * ******* * ** ** * **** * * * = sum + temp1;
* * * ** * * * *** * * **** **** ** *** * * ** ** *** * ***** * ", temp1);
* * ** * * *** * ** ** * * * ** * ** *** = n/10;

* * ** ****** ** ** * * ** ****** * ****** * **** * = n%10;
* *** ******* ** ** ** * * * *** * * ** * * = temp1*3;
* ** ** * * **** * * *** * *** *** * ** * = sum + temp1;
* * *** * *** **** * ** ** * ****** *** * **** ** *** * ***** ** * ", temp1);
* **** *** ***** * * * ** * ** * ** * ** = n/10;

*** * * * ** ** * ** * * * * **** * * * *** = n%10;
* **** * * * * * * * ** * * *** * * = temp1*1;
* * ** * * * **** * ** * * * *** = sum + temp1;
** * *** * * * * * * ** ** * * **** * *** * ", temp1);
******** * * * * * **** *** *** * ** * * * = n/10;

* * ** * ** **** ** ** ** ** * * ** * ** = n%10;
* * * * ** * * * * * **** ** *** **** = temp1*3;
*** ** * ** * **** *** * * * * ** **** *** = sum + temp1;
* *** * *** * * ** **** * * ***** * * * **** ", temp1);
* * * * ***** * * *** * * * * **** = n/10;

** ** ** * ** * ** * * * * * ** *** = n%10;
* ** * ** * * ** ** * ** ** ** * ** ** * ** **** = temp1*1;
** * * ** * ** * ** ***** ** ******** = sum + temp1;
*** * * **** ****** * **** * ** * ** * *** * * * * * ", temp1);
* * * * * ** * * ** * ** ** **** *** * * * **** = n/10;

** ** ** ** ** **** ** **** * * * * * * * * = n%10;
** ** * * * *** * *** * *** * ** ***** ** * * = temp1*3;
** * ***** *** * ** *************** ** * * = sum + temp1;
** * * ** * ** * ** * *** ** *** * * * * ***** * * * ** ", temp1);
*** *** * * *** * *** * * ** * *** * * ** * = n/10;

* * * * **** ** *** *** *** ***** * * **** *** ** = n%10;
*** *** ** * ** * * *** * * * * **** *** = temp1*1;
* * *** * ** **** * * *** * ** ** *** * * * = sum + temp1;
**** * *** *** *** ***** * ** * ** ** * * **** **** * ** ", temp1);
* * * * * * * * * ****** ** * * **** *** * * = n/10;

* *** ** *** * * ** * *** ** ** * * * ** = n%10;
* * ** **** **** **** * * ***** * ** * ** * * = temp1*3;
*** * * **** ********* ** * ** **** ** ** ***** ** = sum + temp1;
*** * * *** *** ** ** **** * * * * **** ** ** ** * * * ** ", temp1);
* ** ******* * * * * *** * = n/10;

* ******* * * * ** *** ** ** * ***** * * ** * = n%10;
* * *** * * * * ** **** ** * * = temp1*1;
*** * * *** ** * * * * * ** * * ** * *** = sum + temp1;
* *** * * ****** * * *** * * * * ******* **** * * ** ", temp1);
* *** *** ** ***** * * ** * ** * = n/10;

* ** * ** * ************ * ** * *** *** * *** = n%10;
* ***** ** * ** *** * ***** * * * * = temp1*3;
** * * * * ** ** **** * * * *** * * * *** = sum + temp1;
** * ** *** * * * * *** * * * **** * * * * * * * * ", temp1);
** * * ** * ****** *** *** * * * ** * ** * * ** * = n/10;

* * * * ** * ** * ** * * * *** * ** ** = n%10;
* * *** ****** ** *** * * * * ***** **** ** = temp1*1;
* ** * * * * ** * * * * ** ** * * *** ** = sum + temp1;
* * * * * * ** * * * ** * ** *** * * * * * * * ", temp1);

****** * *** * ** *** * *** * * ** *** * * *** * * ",sum);
* * * *** * * ** *** * * * * *** * * ***** = 10 - (sum%10);


* * * * * ** * *** **** ** * * * ***** * * * ** * == check)
** ** * ** * * * * ** * ** ** * **** * * ** * * ** * ****** *** *** ** ** ** * * ** ISBN\n");
* * *** * *** * * ** ** ** * ** ** *
***** * * ** * * ** * * ****** ** * * **** * * *** ** *** **** ** * ISBN\n");

    return 0;
}
90/100 answered by (-74 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 ** ** * ***


int main (void)
{

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

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



total= ** ** ***** ** *** ** * * ***** *** * ** *** ** * * ****

check_digit= (10-(total%10));

 if (check_digit!=num13)
* ** * ****** ** **

*** **** * * * ** ** * * ISBN");

** **** * *** *

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


* * * * *** ** ** *** ** **** * **** ***** * ***** ISBN");

}

return 0;
}
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:9:7: 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!
#include * *** * * **


int main (void)
{

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

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



total= * ** * * ** * *** ***** ***** ** * *** **** ***** * ***** * *

check_digit= (10-(total%10));

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

* * ** *** **** * * ** ISBN");

}

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


******** * * ** * ****** * **** * ** * ** ** ** * ISBN");

}

return 0;
}
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:9:7: 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!
#include<stdio.h>
int main()
{
* ** **** * *** *** *** * a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, sum1,sum2, sum3, check;
* ** ** ** * *** ** * * * * * *** * * * * ** ** * *** ***** * ** * **** *** * * ** * ** ** * * ** ** ** * ** *** *** *** * ** * ** ***

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

*** * * * *** ** ** ** * * ** sum1+sum2;

*** *** * * ** * 10 - (sum3%10);

****** * * * ** ** *** * ******
** * ** * *** * ***
* ****** ***** ** * ****** ** * ***** ** * *** * ISBN");
* * ** * * ** * ** ** *
****** * * * * *** * * *
* * * * * ****** **** *
* * * * ** ** *** * *** ** ** ** * * *** ** **** ** * ** * * * IBSN");
* *** * * ***** * ** * **
** ** ** * * * **** 0;
}
answered by (-233 points)
0 0
prog.c: In function 'main':
prog.c:5:14: warning: format '%ld' expects argument of type 'long int *', but argument 2 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
              ^
prog.c:5:17: warning: format '%ld' expects argument of type 'long int *', but argument 3 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                 ^
prog.c:5:20: warning: format '%ld' expects argument of type 'long int *', but argument 4 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                    ^
prog.c:5:23: warning: format '%ld' expects argument of type 'long int *', but argument 5 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                       ^
prog.c:5:26: warning: format '%ld' expects argument of type 'long int *', but argument 6 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                          ^
prog.c:5:29: warning: format '%ld' expects argument of type 'long int *', but argument 7 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                             ^
prog.c:5:32: warning: format '%ld' expects argument of type 'long int *', but argument 8 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                ^
prog.c:5:35: warning: format '%ld' expects argument of type 'long int *', but argument 9 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                   ^
prog.c:5:38: warning: format '%ld' expects argument of type 'long int *', but argument 10 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                      ^
prog.c:5:41: warning: format '%ld' expects argument of type 'long int *', but argument 11 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                         ^
prog.c:5:44: warning: format '%ld' expects argument of type 'long int *', but argument 12 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                            ^
prog.c:5:47: warning: format '%ld' expects argument of type 'long int *', but argument 13 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                               ^
prog.c:5:50: warning: format '%ld' expects argument of type 'long int *', but argument 14 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                                  ^
0 like 0 dislike
Hidden content!
#include *** * ***


int main (void)
{

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

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



total= * * ** * *** * ** * * * ** * * ** * *** * ** **** ** * * *
check_digit= 10-(total%10);

 if ** * * **
* * ** * * * *** **** *

** * **** * * * ** * ******
}

 else if * * *
*** ** * **** ** *** *

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

 }

return 0;
}
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:9:7: 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!
#include * *


int main (void){

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

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



total= *** ** ** ******** * ****** * **** ***** ** ** ** **** * ** *
check_digit= 10-(total%10);

 if * * * ***
* * * * * **** ***


**** * *** * ** ** * * ** * ** * *** ** * ****
}
 
** * * * if ** **
* *** * *** **

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

 }

return 0;
}
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:8:11: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
 scanf("%13d",num1,num2,num3,num4,num5,num6,num7,num8,num9,num10,num11,num12,num13);
           ^
prog.c:8:7: 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!
#include<stdio.h>
int main(void)
{
** ******** * ** * * a,b,c,d,e,f,g,h,i,j,k,l,m;
** * *** * ** * * * **** * *** ****** * * *** * *** ** *** ** * *** ***** * * ** ** ** * * * **** ** **** * * ** ** ****

** **** *** * * * * * check,sum;
* ***** * **** ** *** * ****** * ** * *
**** *** ***** ** * * * * * ****** ** ***
**** * ** * * * ** **** * * * *

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

    



* * * *** **** ** != m)
* ******* ** ** *** *
* * * * ** *** * ****** ***** * * ** ** * ** **** * ** *** ISBN");
* *** ***** * ****** * *
* * * * ** * * *** * * * *
* * * ** * **** *
*** * ***** * * * ** ***** * * ***** ** * * * ISBN");
    }

return 0;
}
answered by (-249 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 ** ** ** * ** * ** *
int * ** ****
* *** ** number 13: ");
** * * * ** * * * ** ** ** * * * * *** ** * *
* ******* **** * * ** * ** *
* **** * * *** **** * *** *** * *
**** ***
** * * * *
**
* * * ** * **
}else {
* * * * ** * * ** * *
}

return 0;
}
answered by (16 points)
0 0
prog.c: In function 'main':
prog.c:6:9: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
         ^
prog.c:6:11: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
           ^
prog.c:6:13: warning: format '%d' expects argument of type 'int *', but argument 4 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
             ^
prog.c:6:15: warning: format '%d' expects argument of type 'int *', but argument 5 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
               ^
prog.c:6:17: warning: format '%d' expects argument of type 'int *', but argument 6 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                 ^
prog.c:6:19: warning: format '%d' expects argument of type 'int *', but argument 7 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                   ^
prog.c:6:21: warning: format '%d' expects argument of type 'int *', but argument 8 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                     ^
prog.c:6:23: warning: format '%d' expects argument of type 'int *', but argument 9 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                       ^
prog.c:6:25: warning: format '%d' expects argument of type 'int *', but argument 10 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                         ^
prog.c:6:27: warning: format '%d' expects argument of type 'int *', but argument 11 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                           ^
prog.c:6:29: warning: format '%d' expects argument of type 'int *', but argument 12 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                             ^
prog.c:6:31: warning: format '%d' expects argument of type 'int *', but argument 13 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                               ^
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.70.80.4
©2016-2026

Related questions

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
| 10.9k 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
| 17.4k views
0 like 0 dislike
15 answers
[Exam] asked Dec 9, 2017 in Midterm by thopd (12.1k points)
ID: 36755 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 5.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users