CODE:

#include "DxLib.h"
#include 

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	//SetUseDirect3DVersion(DX_DIRECT3D_9);
	ChangeWindowMode(TRUE);
	if (DxLib_Init() != 0) return 0;
	SetDrawScreen(DX_SCREEN_BACK);

	double d = 0.1;
	float  f = 0.1f;

	unsigned int controlfp = _controlfp(0, 0);

	while (ProcessMessage() == 0 && ScreenFlip() == 0 && ClearDrawScreen() == 0)
	{
		DrawFormatString(0, 0,GetColor(255,255,255),"double: %.1f * %.1f = %.15g",d,d,d*d);
		DrawFormatString(0,20,GetColor(255,255,255),"float:  %.1f * %.1f = %.15g",f,f,f*f);

		switch (GetUseDirect3DVersion()) {
		case DX_DIRECT3D_9:
			DrawString(0,40,"DX_DIRECT3D_9",GetColor(255,255,255));
			break;
		case DX_DIRECT3D_9EX:
			DrawString(0,40,"DX_DIRECT3D_9EX",GetColor(255,255,255));
			break;
		case DX_DIRECT3D_11:
			DrawString(0,40,"DX_DIRECT3D_11",GetColor(255,255,255));
			break;
		}

		switch (controlfp & _MCW_PC) {
		case _PC_24:
			DrawString(0,60,"_PC_24",GetColor(255,255,255));
			break;
		case _PC_53:
			DrawString(0,60,"_PC_53",GetColor(255,255,255));
			break;
		case _PC_64:
			DrawString(0,60,"_PC_64",GetColor(255,255,255));
			break;
		}
	}

	DxLib_End();
	return 0;
}