获取计算机的域名api

#include <windows.h>
#include <iostream>

int main() {
    char buffer[256];
    DWORD size = sizeof(buffer);
    if (GetComputerNameA(buffer, &size)) {
        std::cout << "Computer name: " << buffer << std::endl;
    } else {
        std::cerr << "Failed to get computer name. Error code: " << GetLastError() << std::endl;
    }
    return 0;
}

#include <stdio.h>
#include <unistd.h>
#include <netdb.h>

int main() {
    char hostname[256];
    if (gethostname(hostname, sizeof(hostname)) == 0) {
        struct hostent *host = gethostbyname(hostname);
        if (host != NULL) {
            printf("Computer name: %s\n", host->h_name);
        } else {
            perror("Failed to get host by name");
        }
    } else {
        perror("Failed to get hostname");
    }
    return 0;
}