include <vector>
include <iostream>
include <string>

// C++ helper functions in raw blocks
raw {
    std::vector<int> cpp_make_vector(int a, int b, int c) {
        return {a, b, c};
    }
    
    int cpp_sum_vector(std::vector<int>& vec) {
        int sum = 0;
        for (int x : vec) sum += x;
        return sum;
    }
    
    void cpp_print(const char* msg) {
        std::cout << "[C++] " << msg << std::endl;
    }
}

fn main() {
    "=> Zen C + C++ interop.";
    
    cpp_print("Hello from C++!");
    
    var vec = cpp_make_vector(10, 20, 30);
    var result = cpp_sum_vector(vec);
    "Sum of C++ vector: {result}";
    
    raw {
        std::string s = "C++ string: works!";
        std::cout << s << std::endl;
    }
}