【c++】游戏组件2 移动的小球

我做了一个控制台版的“移动的小人”

c++编译器均能编译

#include
#include 
using namespace std;
long long x, y, y_x, y_y;
void color(int c)
{
	SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), c);
	return;
}
void ycgb()
{
	CONSOLE_CURSOR_INFO cursor;
	cursor.bVisible = FALSE;
	cursor.dwSize = sizeof(cursor);
	HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
	SetConsoleCursorInfo(handle, &cursor);
	return;
}
void ydgb(long long h, long long l)
{
	COORD pos = { l,h };
	HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
	SetConsoleCursorPosition(hOut, pos);
	return;
}
int main()
{
	system("mode con cols=100 lines=40");
	color(240);
	ycgb();
	system("cls");
	y_x = x = 20, y_y = y = 50;
	while (1)
	{
		ydgb(x - 2, y);
		cout << 'o';
		y_x = x;
		y_y = y;
		if (GetKeyState('A') < 0 && y > 0)
		{
			y--;
		}
		if (GetKeyState('D') < 0 && y < 99)
		{
			y++;
		}
		if (GetKeyState('W') < 0 && x > 2)
		{
			x--;
		}
		if (GetKeyState('S') < 0 && x < 41)
		{
			x++;
		}
		Sleep(30);
		ydgb(y_x - 2, y_y);
		cout << " ";
	}
	return 0;
}