A simple and maybe illustrative cpp example with a class and a main.

emoji.cpp

#include <stdio.h>  // <--- printf()
#include <string>
#include <vector>

// using namespace std; // <--- Never !

/* EMOJI CLASS */
class emoji
{
  public:
    // Una lista de cadenas de texto.
    std::vector<std::string> faces;

    // Constructor de la clase emoji.
    emoji()
    {
        faces.push_back(":)");
        faces.push_back("^^");
        faces.push_back("=P");
        faces.push_back("\\*.*/");
    }
}; // <-- SemiColon at the end of the class


/* ENTRYPOINT */
int main() {
  
    // Create emoji object.
    auto em = emoji();

    // Iter over face list.
    for (auto face : em.faces) {
        printf(" %s \n", face.c_str());
    }

    // All ok
    return 0;
}