如何实现输入输出互不干扰？

void gotoxy(int x, int y) {//CSDN抄的 
	COORD pos = {x,y};
	HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
	SetConsoleCursorPosition(hOut, pos);
}
while(1){
	POINT p;
	g=_getch();//没有读到字符时，如何使其进行下一步？
	GetCursorPos(&p);
	ScreenToClient(h,&p); 
	GetCurrentConsoleFont(hOutput, FALSE, &consoleCurrentFont);
	gotoxy(maosx,maosy);
	printf(" ");
	maosx=p.x/=consoleCurrentFont.dwFontSize.X;
	maosy=p.y/=consoleCurrentFont.dwFontSize.Y;
	gotoxy(maosx,maosy);        
	printf("+");
}