cpp: added int32toIPv4 kata solution

Author: ProjectMutilation

cpp/codewars/int32toip.cpp

@@ -0,0 +1,16 @@
+//https://www.codewars.com/kata/52e88b39ffb6ac53a400022e/
+#include <sstream>
+#include <iomanip>
+#include <iostream>
+#include <bitset>
+std::string uint32_to_ip(uint32_t ip){
+    std::stringstream ss;
+    auto const separator = ".";
+    std::bitset<32> bits = std::bitset<32>(ip);
+    auto fourth_octet = ((bits&std::bitset<32>(0x000000FF)) >>  0).to_ulong();
+    auto third_octet  = ((bits&std::bitset<32>(0x0000FF00)) >>  8).to_ulong();
+    auto second_octet = ((bits&std::bitset<32>(0x00FF0000)) >> 16).to_ulong();
+    auto first_octet  = ((bits&std::bitset<32>(0xFF000000)) >> 24).to_ulong();
+    ss<<first_octet<<separator<<second_octet<<separator<<third_octet<<separator<<fourth_octet;
+    return ss.str();
+}