Update Readme.md

Readme.md

@@ -3,3 +3,48 @@
 GSOCK is a project created by [Kiritow](https://github.com/kiritow).
 
 Licensed under MIT
+
+# Example
+
+## TCP Client Example
+```cpp
+#include "GSock/gsock.h"
+#include "GSock/gsock_helper.h"
+
+int main()
+{
+    int ret;
+    std::string ip;
+    if ((ret = DNSResolve("kiritow.com", ip)) < 0)
+    {
+        printf("Failed to resolve ip address. (%d)\n", ret);
+        return 1;
+    }
+    
+    sock s;
+    if ((ret = s.connect(ip, 80)) < 0)
+    {
+        printf("Failed to connect. (%d)\n", ret);
+        return 1;
+    }
+
+    std::string context("GET / HTTP/1.1\r\nHost: kiritow.com\r\nAccept: */*\r\n\r\n");
+    sock_helper sh(s);
+    if ((ret=sh.sendall(context.c_str(), context.size())) < 0)
+    {
+        printf("Failed to send request header. (%d)\n", ret);
+        return 1;
+    }
+
+    char buff[1024];
+    while (true)
+    {
+        memset(buff, 0, 1024);
+        int ret = s.recv(buff, 1024);
+        if (ret <= 0) break;
+        printf("%s", buff);
+    }
+
+    return 0;
+}
+```