getchar() 和getch()

#include <iostream>
#include <conio.h>
using namespace std;

void main()
{

	while (true)
	{
		cout << "please enter a char " << endl;
		//getchar()要按Enter才要生效
		if ('q' == getchar())
		{
			cout << "hello poem" << endl;
			break;
		}
		//这个输入后就生效
		if ( ' '  == _getch()) //#include <conio.h>
		{
			cout << "hello poet" << endl;
			break;
		}

	}

}

C语言缓冲区谈getchar()、getche()、getch()