easyx:

#include "iostream"
#include "easyx.h"
#include "cstdio"
using namespace std;
int main() {
	initgraph(800, 600);
	setorigin(400, 300);
	setaspectratio(1, -1);
	//绘制多边形:polygon(const POINT	*points,int num);
	//points 是一个POINT类型的指针,num指明数组中有多少个元素
	//结构POINT是easyx中自带的
	//原型：
	//typedef struct{
	// long x;
	// long y;
	//}POINT;
	/*绘制三边型*/POINT points[] = {{0,200},{200,-200},{-200,-200}};
	polygon(points, 3);
	/*绘制四边型*/POINT points2[] = { {-200,100},{200,100},{200,-100},{-200,-100} };
	polygon(points2, 4);
	/*绘制梯形*/POINT points3[] = { {-100,100},{100,100},{200,-100},{-200,-100} };
	polygon(points3, 4);
	getchar();
	closegraph();
}

#include "iostream"
#include "easyx.h"
#include "cstdio"
using namespace std;
int main() {
	initgraph(800, 600);
	setorigin(400, 300);
	setaspectratio(1, -1);
	//更改描边颜色:setlinecolor(color)
	setlinecolor(YELLOW);
	circle(0, 0, 200);
	//设置画线样式(原型):
	//setlinestyle(
	//int style;
	// int thickness=1;
	// const DWORD *puserstyle =NULL;
	// DWORD userstylecount=0);
	//重点看前两个参数(后面两个可以不设):style：画线样式,thickness(就是粗细)：画线宽度，单位为像素，默认1像素
	//const DWORD *puserstyle =NULL;	用户自定义样式
	//DWORD userstylecount=0	自定义样式数量
	//画线样式:style可分为(线型，端点，连接)样式
	//线型就是实线，虚线这种
	/*粗细为5的实线*/setlinestyle(PS_SOLID, 5);
	line(-300, 200, 300, 200);
	/*粗细为5的虚线*/setlinestyle(PS_DASH, 5);
	line(-300, 100, 300, 100);
	//端点就是整个形状
	//连接就是做多边形时两边相结合时，结合地方的样式
	//填充绘制图形：在描边绘制图形的函数前面加上solid
	//例：填充绘制圆形:solidcircle(int x,int y,int radius)
	//更改填充颜色:setfillcolor(color)
	setfillcolor(RED);
	solidcircle(-200, -200, 50);
	//既要描边又要填充绘制图形，在函数名前加上fill
	setfillcolor(BLUE);
	setlinecolor(YELLOW);
	setlinestyle(PS_DASH, 12);
	fillcircle(0, 0, 200);
	getchar();
	closegraph();
	//线型
	/*PS_SOLID(实线)
	PS_DASH(虚线)
	PS_DOT(点线)
	PS_DASHDOT(线与点)
	PS_DASHDOTDOT(线点点)
	PS_NULL(不可见)*/
	//端点
	/*PS_ENDCAP_ROUND(端点为圆形)
	PS_ENDCAP_SQUARE(端点为方形)
	PS_ENDCAP_FLAT(端点为平坦)*/
	//连接
	/*PS_JOIN_BEVEL(连接处为斜面)
	PS_JOIN_MITER(连接处为斜接)
	PS_JOIN_ROUND(连接处为圆弧)*/
}

 

#include "iostream"
#include "easyx.h"
#include "cstdio"
#define PI 3.14
using namespace std;
int main() {
	initgraph(1024, 1024);
	//更改窗体颜色:setbkcolor(color),只有这个相当于你只有一只白色的笔，还需要填充整个窗体
	//清空绘图设备，它会使用当前的背景色填充整个窗体:cleardevice()
	setbkcolor(WHITE);
	cleardevice();
	setlinecolor(BLACK);
	setfillcolor(BLUE);
	setlinestyle(PS_SOLID, 10);
	fillellipse(118, 125, 990, 931);
	Sleep(1000);
	setlinecolor(BLACK);
	setfillcolor(WHITE);
	fillellipse(189, 271, 919, 931);
	fillellipse(375, 170, 555, 420);
	fillellipse(555, 170, 735, 420);
	Sleep(1000);
	setfillcolor(BLACK);
	fillcircle(484, 333, 25);
	fillcircle(617, 333, 25);
	Sleep(1000);
	setfillcolor(WHITE);
	setlinecolor(WHITE);
	fillcircle(484, 333, 10);
	fillcircle(617, 333, 10);
	Sleep(1000);
	setfillcolor(RED);
	setlinecolor(BLACK);
	fillcircle(554, 420, 35);
	line(554, 460, 554, 828);
	Sleep(1000);
	arc(320, 510, 789, 827, PI, 2 * PI);	//因为一开始没有翻转y轴，所以起始角度为180，结束为360
	Sleep(1000);
	line(125,313,296,410);
	line(83,444,270,474);
	line(83,595,262,537);
	line(819,414,990,320);
	line(845,478,1029,448);
	line(853,542,1029,660);
	Sleep(1000);
	getchar();
	closegraph();
}