- 1 year ago
Get computername from hostname in C++?
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In C++, you can get the computer name from the hostname using the gethostbyname
function from the <netdb.h>
header. Here's an example:
cpp#include <iostream>
#include <netdb.h>
#include <arpa/inet.h>
int main() {
const char* hostname = "your_hostname_here";
struct hostent* host = gethostbyname(hostname);
if (host != nullptr) {
char* ip_address = inet_ntoa(*reinterpret_cast<struct in_addr*>(host->h_addr));
std::cout << "Computer Name: " << hostname << std::endl;
std::cout << "IP Address: " << ip_address << std::endl;
} else {
std::cerr << "Failed to get computer name." << std::endl;
}
return 0;
}
Replace "your_hostname_here"
with the actual hostname you want to retrieve the computer name for. The gethostbyname
function returns a hostent
structure containing information about the host. We can extract the IP address from the h_addr
field of the hostent
structure using inet_ntoa
function.
Compile and run the code, and it will output the computer name and IP address corresponding to the provided hostname. Note that this code is for POSIX systems (like Linux), and you may need to make adjustments if you're targeting a different platform, such as Windows.