C++

#include <iostream>

int main()
{
    // one line comment

    /**
     * multi -line blck comment
     * antother line
     * oh! another one!
     */
    auto result = (10 <=> 20) > 0;
    std::cout << result << std::endl;
    std::cout << "Number1";
    std::cout << "Hello World!" << std::endl;
}

#include <iostream>
#include <cstdio>
using namespace std;

int main()
{
    printf("Hello, world!");
    return 0;
}