C语言fillpoly函数详解

#include <graphics.h>#include <stdlib.h>#include <stdio.h>#include <conio.h> int main(void){ /* request auto detection */ int gdriver = DETECT, gmode, errorcode; int i, maxx, maxy;  /* our polygon array */ int poly[8];  /* initialize graphics, local variables */ initgraph(&gdriver, &gmode, "");  /* read result of initialization */ errorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ { printf("Graphics error: %s/n", grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); exit(1); /* terminate with an error code */ }  maxx = getmaxx(); maxy = getmaxy();  poly[0] = 20; /* 1st vertext */ poly[1] = maxy / 2;  poly[2] = maxx - 20; /* 2nd */ poly[3] = 20;  poly[4] = maxx - 50; /* 3rd */ poly[5] = maxy - 20;  /* 4th vertex. fillpoly automatically closes the polygon. */ poly[6] = maxx / 2; poly[7] = maxy / 2;  /* loop through the fill patterns */ for (i=EMPTY_FILL; i<USER_FILL; i++) { /* set fill pattern */ setfillstyle(i, getmaxcolor());  /* draw a filled polygon */ fillpoly(4, poly);  getch(); }  /* clean up */ closegraph(); return 0;}