#include <iostream>
#include <string>
#include <cstring>
#include <cstdlib>

bool ParseHostIPPort(const std::string& hostURL, std::string& hostIP) {
	const char* colon = std::strchr(hostURL.data(), ':');
	if (colon == NULL) {
	return false;
	}
	hostIP = std::string(hostURL.data(), colon);
	return true;
}
int main()
{
	std::string hostIP;
	if (ParseHostIPPort("abc:123", hostIP))
	{
		std::cout << hostIP << std::endl;
	}
}