Как проверить работоспособность интернета

#include <iostream>
#include <stdlib.h>
#include <string>
 
using namespace std;
 
int main()
{
    string ip_addr;
    string command("ping ");
    int st;
    cout << "input ip addres"<< endl;
    cin >> ip_addr;
 
    command += ip_addr;
    command += " -c3";
 
    st = system(command.data());
    if (st == 0)
    {
        cout << "All good"<<endl;
    }
    else
    {
        cout << "All bad"<<endl;
    }
    cout << st << endl;
    return 0;
}

#include <stdio.h>
#include <winsock2.h>
 //#pragma comment(lib, "Ws2_32.lib")
 
int main() { 
  WSADATA wData;
  if(WSAStartup(MAKEWORD(1,1),&wData)!=0) {return 0;}
 
  SOCKET sock = socket(AF_INET,SOCK_STREAM,0);
  if(!sock) {return 0;}
 
  struct sockaddr_in addr;
  addr.sin_family = AF_INET;
  addr.sin_port = htons(80);
  hostent *host = gethostbyname("ya.ru");
  addr.sin_addr = *(struct in_addr*)host->h_addr_list[0];
 
  connect(sock,(struct sockaddr*)&addr,sizeof(addr));
 
  char request[] =
  "GET / HTTP/1.1\r\n"
  "Host: ya.ru\r\n"
  "Connection: close\r\n"
  "\r\n";
  char answer[2048];
 
  send(sock,&request[0],sizeof(request),0);
  recv(sock,&answer[0],sizeof(answer),0);
  puts(answer);
 
  shutdown(sock,2);
  closesocket(sock);
  WSACleanup();
 
  system("pause");
}