Add: Code-block

Author: ferhatgec

README.md

@@ -1,4 +1,29 @@
 # curl4cpp
 ## single header cURL wrapper for C++ around libcURL.
 
+### An example: 
+```cpp
+#include <iostream>
+#include <string>
+#include "curl4.hpp"
+
+int main() {
+    curl4::CURL4 init = curl4::easy::init();
+
+    {
+        std::string val;
+
+        init.setopt(CURLOPT_URL, "https://raw.githubusercontent.com/ferhatgec/bufsize/master/example.cpp");
+        init.setopt(CURLOPT_WRITEFUNCTION, curl4::easy::writefunc);
+        init.setopt(CURLOPT_WRITEDATA, &val);
+        
+        CURLcode res = curl4::easy::perform(init);
+
+        std::cout << val << '\n';
+    }
+
+    return 0;
+}
+```
+
 ### curl4cpp licensed under the terms of MIT License.