直线DDA算法的C语言实现

注:输入线段起点和终点的x,y坐标,程序将生成直线, 每生成10个点暂停显示一下当前x,y坐标位置.
	#include<graphics.h> void main() { int driver,mode; int xa,ya,xb,yb,c; int dx,dy,steps,k; float fx,fy,x,y; int wx,wy; driver=DETECT; mode=0; initgraph(&driver,&mode,""); printf("please enter the start point:/n"); printf(" xa= "); scanf("%d",&xa); printf(" ya= "); scanf("%d",&ya); printf("please enter the end point:/n"); printf(" xb= "); scanf("%d",&xb); printf(" yb= "); scanf("%d",&yb); dx=xb-xa; dy=yb-ya; if(abs(dx)>abs(dy)) steps=abs(dx); else steps=abs(dy); fx=(float)dx/(float)steps; fy=(float)dy/(float)steps; x=xa; y=ya; putpixel(x,y,RED); for(k=1;k<=steps;k++) { x+=fx; y+=fy; putpixel(x,y,RED); if(k%10==0) { printf(" xc=%.2f yc=%.2f/n",x,y); getch(); } } }