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outtextxy(150,40,"How beautiful it is!"); line(130,60,480,60); setcolor(2); circle(269,269,137); } ----------------------------------------------------------------------------- 【程序59】 题目：画图，综合例子。 1.程序分析： 2.程序源代码： # define PAI 3.1415926 # define B 0.809 # include "graphics.h" #include "math.h" main() { int i,j,k,x0,y0,x,y,driver,mode; float a; driver=CGA;mode=CGAC0; initgraph(&driver,&mode,""); setcolor(3); setbkcolor(GREEN); x0=150;y0=100; circle(x0,y0,10); circle(x0,y0,20); circle(x0,y0,50); for(i=0;i<16;i++) { a=(2*PAI/16)*i; x=ceil(x0+48*cos(a)); y=ceil(y0+48*sin(a)*B); setcolor(2); line(x0,y0,x,y);} setcolor(3);circle(x0,y0,60); /* Make 0 time normal size letters */ settextstyle(DEFAULT_FONT,HORIZ_DIR,0); outtextxy(10,170,"press a key"); getch(); setfillstyle(HATCH_FILL,YELLOW); floodfill(202,100,WHITE); getch(); for(k=0;k<=500;k++) { setcolor(3); for(i=0;i<=16;i++) { a=(2*PAI/16)*i+(2*PAI/180)*k; x=ceil(x0+48*cos(a)); y=ceil(y0+48+sin(a)*B); setcolor(2); line(x0,y0,x,y); } for(j=1;j<=50;j++) { a=(2*PAI/16)*i+(2*PAI/180)*k-1; x=ceil(x0+48*cos(a)); y=ceil(y0+48*sin(a)*B); line(x0,y0,x,y); } } restorecrtmode(); } ----------------------------------------------------------------------------- 【程序60】 题目：画图，综合例子。 1.程序分析： 2.程序源代码： #include "graphics.h" #define LEFT 0 #define TOP 0 #define RIGHT 639 #define BOTTOM 479 #define LINES 400 #define MAXCOLOR 15 main() { int driver,mode,error; int x1,y1; int x2,y2; int dx1,dy1,dx2,dy2,i=1; int count=0; int color=0; driver=VGA; mode=VGAHI; initgraph(&driver,&mode,""); x1=x2=y1=y2=10; dx1=dy1=2; dx2=dy2=3; while(!kbhit()) { line(x1,y1,x2,y2); x1+=dx1;y1+=dy1; x2+=dx2;y2+dy2; if(x1<=LEFT||x1>=RIGHT) dx1=-dx1; if(y1<=TOP||y1>=BOTTOM) dy1=-dy1; if(x2<=LEFT||x2>=RIGHT) dx2=-dx2; if(y2<=TOP||y2>=BOTTOM) dy2=-dy2; if(++count>LINES) { setcolor(color); color=(color>=MAXCOLOR)?0:++color; } } closegraph(); }
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