g++ hello.cpp -o hello code example

Example 1: c++ hello world

#include <iostream>

int main()
{
  std::cout << "Hello, C++!" << std::endl;
  return 0;
}

Example 2: c++ hello world

#include <iostream>
using namespace std;

int main() {
	cout << "Hello World"; 
}

Example 3: c++ hello world

// Your First C++ Program

#include <iostream>

int main() {
    std::cout << "Hello World!";
    return 0;
}