void gotoxy(int x, int y) {
// printf("\033[%d;%dH", y, x);
COORD V={x, y};
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), V);
}
void clrscr()
{
//Clear Screen
// Refer:
// https://zhuanlan.zhihu.com/p/415237147
HANDLE hdout = GetStdHandle(STD_OUTPUT_HANDLE); // Get standard output handler
CONSOLE_SCREEN_BUFFER_INFO csbi; // Define screen buffer attribute variable
GetConsoleScreenBufferInfo(hdout, &csbi); // Get screen buffer attribute variable
DWORD size = csbi.dwSize.X * csbi.dwSize.Y, num = 0; // Define screen size
COORD pos = {0, 0}; // initial left-top (0,0) coordinate
// Fill the window as ' ' space to clear the buffer
FillConsoleOutputCharacter(hdout, ' ', size, pos, &num);
FillConsoleOutputAttribute (hdout, csbi.wAttributes, size, pos, &num );
SetConsoleCursorPosition(hdout, pos); // Set cursor to (0,0)
}