cir.rar_扫描

#include<stdio.h> #include<math.h> #include<graphics.h> circle_points(x,y,red,xc,yc) { putpixel(x+xc,y+yc,red); putpixel(y+xc,x+yc,red); putpixel(y+xc,-x+yc,red); putpixel(x+xc,-y+yc,red); putpixel(-x+xc,-y+yc,red); putpixel(-y+xc,-x+yc,red); putpixel(-y+xc,x+yc,red); putpixel(-x+xc,y+yc,red); } bresenham_Circle(xc,yc,r,red) { int x,y,d; x=0;y=r; d=3-2*r; while(x<y) { circle_points(x,y,red,xc,yc); if(d<=0) { d=d+4*(x-y)+10; y=y-1; } else d=d+4*x+6; x=x+1; } if(x==y) circle_points(x,y,red); } void main() { int a,b,c; int gd=DETECT,gm; registerbgidriver(EGAVGA_driver); initgraph(&gd,&gm,""); printf("input xc yc r:\n"); scanf("%d%d%d",&a,&b,&c); bresenham_Circle(a,b,c,RED); getch(); closegraph(); }