Merge pull request #439 from codecrafters-io/andy/fix

Fix C++ solution diff

Author: andy1li

solutions/cpp/02-rg2/code/src/Server.cpp renamed to solutions/cpp/02-rg2/code/src/main.cpp

@@ -1,57 +1,38 @@
-@@ -1,56 +0,0 @@
--#include <iostream>
--#include <cstdlib>
--#include <string>
--#include <cstring>
--#include <unistd.h>
--#include <sys/types.h>
--#include <sys/socket.h>
--#include <arpa/inet.h>
--#include <netdb.h>
--
--int main(int argc, char **argv) {
--  // Flush after every std::cout / std::cerr
--  std::cout << std::unitbuf;
--  std::cerr << std::unitbuf;
--  
--  int server_fd = socket(AF_INET, SOCK_STREAM, 0);
--  if (server_fd < 0) {
--   std::cerr << "Failed to create server socket\n";
--   return 1;
--  }
--  
--  // Since the tester restarts your program quite often, setting SO_REUSEADDR
--  // ensures that we don't run into 'Address already in use' errors
--  int reuse = 1;
--  if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0) {
--    std::cerr << "setsockopt failed\n";
--    return 1;
--  }
--  
--  struct sockaddr_in server_addr;
--  server_addr.sin_family = AF_INET;
--  server_addr.sin_addr.s_addr = INADDR_ANY;
--  server_addr.sin_port = htons(6379);
--  
--  if (bind(server_fd, (struct sockaddr *) &server_addr, sizeof(server_addr)) != 0) {
--    std::cerr << "Failed to bind to port 6379\n";
--    return 1;
--  }
--  
--  int connection_backlog = 5;
--  if (listen(server_fd, connection_backlog) != 0) {
--    std::cerr << "listen failed\n";
--    return 1;
--  }
--  
--  struct sockaddr_in client_addr;
--  int client_addr_len = sizeof(client_addr);
--  std::cout << "Waiting for a client to connect...\n";
--
+@@ -25,32 +25,36 @@
+   if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0) {
+     std::cerr << "setsockopt failed\n";
+     return 1;
+   }
+   
+   struct sockaddr_in server_addr;
+   server_addr.sin_family = AF_INET;
+   server_addr.sin_addr.s_addr = INADDR_ANY;
+   server_addr.sin_port = htons(6379);
+   
+   if (bind(server_fd, (struct sockaddr *) &server_addr, sizeof(server_addr)) != 0) {
+     std::cerr << "Failed to bind to port 6379\n";
+     return 1;
+   }
+   
+   int connection_backlog = 5;
+   if (listen(server_fd, connection_backlog) != 0) {
+     std::cerr << "listen failed\n";
+     return 1;
+   }
+   
+   struct sockaddr_in client_addr;
+   int client_addr_len = sizeof(client_addr);
+   std::cout << "Waiting for a client to connect...\n";
+
 -  accept(server_fd, (struct sockaddr *) &client_addr, (socklen_t *) &client_addr_len);
--  std::cout << "Client connected\n";
--
--  close(server_fd);
--
--  return 0;
--}
++  int client_fd = accept(server_fd, (struct sockaddr *) &client_addr, (socklen_t *) &client_addr_len);
+   std::cout << "Client connected\n";
+
++  std::string response = "+PONG\r\n";
++  send(client_fd, response.c_str(), response.size(), 0);
++
++  close(client_fd);
+   close(server_fd);
+
+   return 0;
+ }