HelloYou: TODO

[satyamvats5]

Go through HelloYou.c and complete that TODO part.

[JustinKey187]

Update code to not use older c style and makes the code more readable.
The char length in name was not need. Told pc to ask for a name then spit out to the user. pretty simple stuff. Also updated main to take an int type. Added <stdio.h> and as well as standard namespace.

`#include <stdio.h>
#include

using namespace std;

int main(void)
{
string name;
cout << "What is your name" << endl;;
cin >> name;
cout << "Hello! " << name;
return 0;
}`