简易绘图软件（水一期）-编程知识

哈哈！

1、编写代码：

代码：

main:

#include <graphics.h>
#include <music.h>
#include <heker.h>
#pragma comment( linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"" )using namespace std;
class Point
{
protected:int x;int y;int r;int x1;int y1;
public:Point(){x = 0;y = 0;r = 0;x1= 0;y1= 0;}virtual void set(int a, int b)=0;virtual void setstart(int a,int b)=0;virtual void draw()=0;virtual void drawf()=0;int getx() const{return x;}int gety() const{return y;}
};
class MyCircle:public Point
{virtual void set(int a, int b){int dx = getx() - a;int dy = gety() -b;r = (int)sqrt(dx * dx + dy * dy);x1=a;y1=b;}virtual void setstart(int a,int b){x = a;y = b;r = 0;x1=a;y1=b;}virtual void draw(){circle(x, y, r);}virtual void drawf(){setfillstyle(SOLID_FILL,getcolor());pieslicef(x,y,0,360,r);}};
class rcircle:public Point
{
public:virtual void set(int a,int b){x1=getx() - a;y1=gety() - b;}virtual void setstart(int a,int b){x = a;y = b;r = 0;x1= 0;y1= 0;}virtual  void draw(){ellipsef(x,y,0,360,x1,y1);}virtual   void drawf(){setfillstyle(SOLID_FILL,getcolor());fillellipse(x,y,x1,y1);}
};
class Myline:public MyCircle
{
public:virtual  void draw(){line(x,y,x1,y1);}virtual  void drawf(){line(x,y,x1,y1);}
};
class Ju:public MyCircle
{
public:virtual  void draw(){rectangle(x,y,x1,y1);}virtual void drawf(){setfillstyle(SOLID_FILL,getcolor());int poly[8]={x,y,x1,y,x1,y1,x,y1};fillpoly(4,poly);}
};
int main()
{Hide();int b=0;MyCircle r;rcircle nr;Myline l;Ju ju;Point *p=&r;bool bDraw = false;	initgraph(800, 600, INIT_RENDERMANUAL);setfillstyle(SOLID_FILL,BLUE);  bar(10,20,40,50);setfillstyle(SOLID_FILL,YELLOW);bar(40,20,70,50);setfillstyle(SOLID_FILL,RED);bar(70,20,100,50);setfillstyle(SOLID_FILL,GREEN);bar(100,20,130,50);setfillstyle(SOLID_FILL,WHITE);bar(130,20,160,50);setfillstyle(SOLID_FILL,0xFF6100);bar(160,20,190,50);setfillstyle(SOLID_FILL,0xA020E0);bar(190,20,220,50);setfillstyle(SOLID_FILL,WHITE);       bar(10,51,40,81);setfillstyle(SOLID_FILL,BLACK);line(15,66,35,66);setfillstyle(SOLID_FILL,WHITE);bar(10,82,40,112);setfillstyle(SOLID_FILL,BLACK);circle(25,97,10);setfillstyle(SOLID_FILL,WHITE);bar(10,113,40,143);setfillstyle(SOLID_FILL,BLACK);rectangle(15,120,35,136);setfillstyle(SOLID_FILL,WHITE);bar(10,144,40,174);setfillstyle(SOLID_FILL,BLACK);ellipsef(25,159,0,360,10,6);setfillstyle(SOLID_FILL,WHITE);  bar(10,175,40,205);outtextxy(15,180,"实心");setfillstyle(SOLID_FILL,WHITE);bar(10,206,40,236);outtextxy(10,210,"空心");outtextxy(335,35,"粗细");      setfillstyle(SOLID_FILL,WHITE);bar(400,20,430,50);setfillstyle(SOLID_FILL,BLACK);bar(405,35,425,36);setfillstyle(SOLID_FILL,WHITE);bar(435,20,465,50);setfillstyle(SOLID_FILL,BLACK);bar(440,35,460,38);setfillstyle(SOLID_FILL,WHITE);bar(470,20,500,50);setfillstyle(SOLID_FILL,BLACK);bar(475,35,495,40);outtextxy(565,35,"线条形状");   setfillstyle(SOLID_FILL,WHITE);bar(630,20,660,50);setcolor(BLACK);setlinestyle(PS_SOLID, 0, 1, NULL);line(632,35,657,35);setfillstyle(SOLID_FILL,WHITE);bar(665,20,695,50);setcolor(WHITE);setlinestyle(PS_DOT, 0, 1, NULL);line(667,35,690,35);setlinewidth(3);                 setcolor(WHITE);line(45,55,45,595);line(45,55,795,55);line(45,595,795,595);line(795,55,795,595);setlinewidth(1);setfillstyle(SOLID_FILL,WHITE);  bar(10,300,40,330);outtextxy(10,305,"清屏");setfont(16, 0, "宋体");setcolor(0x00F000F0);setbkcolor(BLACK);setlinestyle(PS_SOLID);mouse_msg msg = {0};for ( ; is_run();delay_fps(60))	{while (mousemsg()){msg = getmouse();}if (msg.is_down())					{if (msg.is_left())				{  BeepMusic("SNA.wav");if(msg.x>9&msg.x<41&msg.y>19&msg.y<51){setcolor(0x0000FF);}else if(msg.x>39&msg.x<71&msg.y>19&msg.y<51){setcolor(0xFFFF00);}else if(msg.x>69&msg.x<101&msg.y>19&msg.y<51){setcolor(0xFF0000);}else if(msg.x>99&msg.x<131&msg.y>19&msg.y<51){setcolor(0x00FF00);}else if(msg.x>129&msg.x<161&msg.y>19&msg.y<51){setcolor(0xFFFFFF);}else if(msg.x>159&msg.x<191&msg.y>19&msg.y<51){setcolor(0xFF6100);}else if(msg.x>189&msg.x<211&msg.y>19&msg.y<51){setcolor(0xA020E0);}else if(msg.x>399&msg.x<431&msg.y>19&msg.y<51){setlinewidth(1);setcolor(getcolor());}else if(msg.x>434&msg.x<466&msg.y>19&msg.y<51){setlinewidth(3);setcolor(getcolor());}else if(msg.x>469&msg.x<501&msg.y>19&msg.y<51){setlinewidth(9);setcolor(getcolor());}else if(msg.x>9&msg.x<41&msg.y>299&msg.y<331){setfillstyle(SOLID_FILL,BLACK);bar(48,58,792,592);}else if(msg.x>630&msg.x<650&msg.y>20&msg.y<50){setlinestyle(PS_SOLID, 0, 1, NULL);setcolor(getcolor());}else if(msg.x>665&msg.x<695&msg.y>20&msg.y<50){setlinestyle(PS_DOT, 0, 1, NULL);setcolor(getcolor());}else if(msg.x>9&msg.x<41&msg.y>50&msg.y<82){p=&l;}else if(msg.x>9&msg.x<41&msg.y>81&msg.y<113){p=&r;}else if(msg.x>9&msg.x<41&msg.y>112&msg.y<144){p=&ju;}else if(msg.x>9&msg.x<41&msg.y>143&msg.y<175){p=&nr;}else if(msg.x>9&msg.x<41&msg.y>174&msg.y<206)//设置一个选择实心空心的开关{b=1;}else if(msg.x>9&msg.x<41&msg.y>205&msg.y<237){b=0;}
else {p->setstart(msg.x,msg.y);setwritemode(R2_XORPEN);	bDraw = true;                  }
}
}if (msg.is_right())		{if (bDraw){   BeepMusic("WIN.wav");if(b==0){p->draw();}else p->drawf();					setwritemode(R2_COPYPEN);bDraw = false;}}else if (msg.is_move())				{if (bDraw){if(b==0){p->draw();}else p->drawf();			p->set(msg.x,msg.y);if(b==0){p->draw();}			else p->drawf();}}else if (msg.is_up())			{if (bDraw){setwritemode(R2_COPYPEN);	p->set(msg.x,msg.y);if(b==0){p->draw();}			else p->drawf();bDraw = false;}}xyprintf(0, 0, "x=%4d y=%4d", msg.x, msg.y);}
closegraph();
return 0;
}