0 like 0 dislike
6.9k 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
| 6.9k 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:172.70.80.5
©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
| 10.7k 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
| 16.9k 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
| 5k views
12,783 questions
183,442 answers
172,219 comments
4,824 users