[c++] fatal error C1010 - "stdafx.h" in Visual Studio how can this be corrected?

I compile the following code but I get a compile error in Visual Studio that I cannot understand.

#include <iostream>

using namespace std;

int main()
{
    int matchCount, findResult;
    long childPID;
    string userInput = "blank";

    // string to be searched through
    string longString = "The PPSh-41 is a Soviet submachine gun designed by Georgi Shpagin as an inexpensive, simplified alternative to the PPD-40.";

    while (userInput.compare("!wq"));
    {
        // reset variables for reuse
        matchCount = 0;
        findResult = -1;

        cout << "Please enter a word/s to search for (!wq to exit): "; // prompts user for string to search for
        cin >> userInput; // takes user input

        if (userInput.compare("!wq")) // checks user input to see if they still wish to search for a string
        {
            childPID = fork();

            if (childPID == 0)
            {
                while (findResult < longString.length)
                {
                    findResult = longString.find(userInput, findResult + 1, userInput.length);

                    if (findResult < longString.length)
                        matchCount++;
                }

                cout << "There are " << matchCount << " instances of " << userInput << " in longString." << endl;
            }
            else
                cout << "childPID != 0" << endl;
        }
        else
            cout << "User has chosen to exit. Exiting." << endl;
    }

    return 0;
}

The error reads:

"wordcount.cpp(57) : fatal error C1010: unexpected end of file while looking for precompiled header. Did you forget to add '#include "stdafx.h"' to your source?"

I don't believe I need a header file to run this code. Thank you for all your help in advance.

The first line of every source file of your project must be the following:

#include <stdafx.h>

Visit here to understand Precompiled Headers

Create a new "Empty Project" , Add your Cpp file to the new project, delete the line that includes stdafx.

Done.

The project no longer needs the stdafx. It is added automatically when you create projects with installed templates.