C++ :: Change Output Of Console?

is there a way to change output of console without clearing the screen? so making some kind of animation?

e.g.

I have used

Code:
cout << "Hello";

is there any way I can erase last "lo" and replace it by "p" so I will have "Help" without clearing the screen ? just changing the output like some text file?

I tried using something like this

Code:
#include <iostream>
using namespace std;
int main() {
cout << "abcd";
long pos = cout.tellp();
cout.seekp(pos-2);
cout.write("ef", 2);
cout.flush();
cin.get();
return 0;
}

but it doesnt work, there is still a "abcd"...