CODE:

#define _CRT_SECURE_NO_DEPRECATE

#define DIST_X 0.56
#define DIST_Y 0.83

#include "DxLib.h"
#include "vector"

using namespace std;

struct SakuraData{
	int x1, y1;
	float x2, y2;
	int x3, y3;
	float x4, y4;

	int rotaNum;	//平面的な回転数

	bool sign;

	int distX, distY;	//x,yそれぞれの移動量

	SakuraData(){
		rotaNum = GetRand(3);
		sign = 0;

	//花びらの初期座標を決める

		int st = GetRand(800)-100;
		int stY = GetRand(130)*(-1)-70;

		x1=st, y1=stY;
		x2=(float)(st+40), y2=(float)stY;
		x3=st+40, y3=stY+66;
		x4=(float)st, y4=(float)stY+66;

	//花びらをひらひらさせる

		double dists[2][2];
		dists[0][0] = DIST_X;
		dists[0][1] = -DIST_X;
		dists[1][0] = DIST_Y;
		dists[1][1] = -DIST_Y;

		int num = GetRand(50);
		for(int i=0;i x3) sign = !sign;

			distX = GetRand(6)-3;
			distY = GetRand(2)+1;
		}
	}
};

int sakuraGH;

char key[256];	//キーの入力状態を記録

vector sakuras;

int WINAPI WinMain(HINSTANCE hI, HINSTANCE hP, LPSTR lpC, int nC){
	ChangeWindowMode(TRUE);
	SetOutApplicationLogValidFlag(FALSE);
	SetWindowText("DxLib");
	if(DxLib_Init() == -1) return(-1);
	SetAlwaysRunFlag(TRUE);
	SetDrawScreen(DX_SCREEN_BACK);

	sakuraGH = LoadGraph("sakura.PNG");

	//花びらを150枚作成
	for(size_t i=0;i sakuras[i].x3) sakuras[i].sign = !(sakuras[i].sign);

			//花びらを平面的に回転させて描画
			int mx1 = sakuras[i].x1, my1 = sakuras[i].y1;
			int mx2 = (int)sakuras[i].x2, my2 = (int)sakuras[i].y2;
			int mx3 = sakuras[i].x3, my3 = sakuras[i].y3;
			int mx4 = (int)sakuras[i].x4, my4 = (int)sakuras[i].y4;

			for(int j=0;j 480){
				int st = GetRand(800)-100;

				sakuras[i].x1=st, sakuras[i].y1=-40-66;
				sakuras[i].x2=(float)(st+40), sakuras[i].y2=(float)(-40-66);
				sakuras[i].x3=st+40, sakuras[i].y3=-40;
				sakuras[i].x4=(float)st, sakuras[i].y4=(float)-40;
			}
		}

		ScreenFlip();
	}

	DxLib_End();
	return(0);
}