Two simple errors I cannot figure out!

[johnnydiamond08]

I'm getting two errors currently in my code.
Error: 'string' was not declared in this scope.
Error: 'titleDisplay' was not declared in this scope.

The following is my code. Any ideas?

#include <iostream>
#include <fstream>
#include <string>
#include "Title.cpp"

void titleDisplay(string);

using namespace std;
int main()
{
    string title;

    titleDisplay(title);




}
// Function name: Title
// Purpose: to display title
void titleDisplay(string title)
{
    fstream fin;

    fin.open("Title.txt");

    while (!fin.eof())
    {
        getline(fin,title);
    }

    cout << title;
}

[vlad from moscow]

You should place directive

using namespace std;

before the declaration of function

void titleDisplay(string);

or write the function declaration as

void titleDisplay(std::string);

[johnnydiamond08]

Thanks for solving me headache sir =) Happy holidays!