Search files that matches specific word in certain directory (C++17)

SearchFile.cpp

#include <experimental\filesystem>
#include <iostream>
#include <fstream>

using namespace std;
using namespace std::experimental::filesystem;

int main(int argc, char* argv[])
{
	if (argc < 2)
	{
		cout << "Usage: Test path\n";
		return 1;
	}

	path p(argv[1]);

	try
	{
		if (exists(p))
		{
			if (is_regular_file(p))
				cout << p << " size is " << file_size(p) << '\n';

			else if (is_directory(p))
			{
				cout << p << " is a directory containing:\n";

				std::vector<std::string> v;

				for (auto&& x : directory_iterator(p))
				{
					ifstream fileInput;
					string line;
					char* search = "Test";

					fileInput.open(x.path().string());
					if (fileInput.is_open())
					{
						while (getline(fileInput, line))
						{
							if (line.find(search, 0) != string::npos) {
								v.push_back(x.path().filename().string());
								break;
							}
						}
					}
					fileInput.close();
				}

				std::sort(v.begin(), v.end());

				for (auto&& x : v)
					cout << "    " << x << '\n';
			}
			else
				cout << p << " exists, but is not a regular file or directory\n";
		}
		else
			cout << p << " does not exist\n";
	}

	catch (const filesystem_error& ex)
	{
		cout << ex.what() << '\n';
	}

	return 0;
}