im still a newbie and I see 2 approaches used to write code in C++, can you guys help me understand with CLEAR EXPLANATION?

Question

// Example program 1 (random approach?)
#include <iostream>
#include <string> // write or dont, result is same

int main()
{
std::string name;
std::cout << "What is your name? ";
getline (std::cin, name);
std::cout << "Hello, " << name << "!\n";
}

// Example program 2 (sololearn approach)
#inlcude <iostream>
using namespace std;

int main()
{
cout << "whats your name?";
string name;
cin >> name << endl;
cout "Hello, " << name << "!\n";
return 0;
}

also, does solo learn C++ course tell us this in the future?

Answer 1

As long as another namespace that you are using does not have cout, cin etc. (which is unlikely) the second way is better.

Answer 2

use example 2, it's a good programming habit to use
using namespace std
and return 0 since main function returns an integer.

Answer 3

They're the same thing, it doesn't matter which one you use, but the second one is definetly better, as long as there are no conflicts

Answer 4

example 2 includes the line "using namespace std" as to avoid having to add std:: prefix all over the code as in example1, thus making the code easier to read .
if the code was using same named methods from different libraries, syntax from example1 is useful
(but this is not the case here, and both examples are equivalent.)