无聊用c++写了个cmd

#include <bits/stdc++.h>
#include <direct.h>
using namespace std;
void print_start()
{
	cout << "自制cmd程序Loading...\n";
	stringstream s;
	string s1;
	for(int i = 0;i <= 15;i++)
	{
		s << ":";
		s >> s1;
		cout << s1;
		sleep(1);
	}
	system("cls");
}
int main()
{
	print_start();
	char* buffer;
	char* command;
	while(1)
	{
		if((buffer = getcwd(NULL,0)) == NULL)
		{
			perror("buffer error");
		}
		else
		{
			printf("%s>",buffer);
			gets(command);
			system(command);
		}
	}
}