Look at the code here:

if (pos != -1)
{
goto badsearch;
}

I think you meant:

if (pos == -1)

That's weird - it works perfect for me.

The function is expecting an int[] (array/pointer) type and you pass an int, instead you should write the function as:
void bookInfo(char[14],char[51],char[31],char[31],char[11],int,double,double);...

outputFile<<"Name: "<<Pname<<" "<<outputFile<<"Date:"<<TDate<<endl;
You output what outputFile returns. This line should be outputFile<<"Name: "<<Pname<<" "<<"Date:"<<TDate<<endl;

I'm guessing it's because of the getline() function. When I replace the

if(AWUTD=='y'||AWUTD=='Y')
{
cout<<"Please Specify:"<<endl;
getline (cin, AWUTDspecification);
}


with

Please use code tags. Otherwise it'll be hard for us to tell you on which lines your mistakes are.

It doesn't matter that 'i' doesn't exist when main() ends and the thread is using it, simply because when main() ends the whole program shuts down, including the threads.

Lines 40-41 - it's a STRING, not a float. I've never heard of a number with two decimal dots.
Also, you didn't end the 'for' loop before the input_type check.
You can see it yourself.

That's because you removed this piece of code from your code:

else if(s[x]=='.')
{
if(!DotReached) DotReached= true;

else
{
input_type=IS_FLOAT;
cout<<"ITs a Float";

You have a few errors:
Firstly, the if(input_value==0)..... should be OUTSIDE the 'for' loop, because you want to check what kind of number the input is after you know it isn't a string nor a char....

for(x=0;x<s.length();x++)
{
if((s[x]>'9' || s[x]<'0') && s[x]!='.')
{
input_type=IS_STRING; break;
cout<<" Its an integer ";
}

else if(s[x]=='.')
{

Why should a constructor fail?
When you declare a constructor, all the instances of the class will have to use it, or variations of it (if you declare some).

I think it would be much smarter to use the built-in function from <algorithm> header file -- random_shuffle():
Run a loop and insert to the array all the numbers between 1 and 10,000, then call...

So, you actually want to round up when (the number) mod 1000 is equal or greater than 500, and down if (the number) mod 1000 is less than 500.
An example to how you could write it:

...

#include<iostream>
#include<string>

using namespace std;

#define IS_STRING 1
#define IS_CHARACTER 2
#define IS_INTEGER 3
#define IS_FLOAT 4

Input to a string, then call a function to check whether it the input string has only digits (and '.', '+' and '-' as first only). If it really has only digits, it's a number. If it has a dot, it's a...