| 词条 | drawpoly |
| 释义 | § 解释 函数名: drawpoly 功 能: 画多边形 用 法: void far drawpoly(int numpoints, int far *polypoints); § 程序例 #include <graphics.h> #include <stdlib.h> #include <stdio.h> #include <conio.h> int main(void) { /* request auto detection */ int gdriver = DETECT, gmode, errorcode; int maxx, maxy; /* our polygon array */ int poly【10】; /* initialize graphics and local variables */ initgraph(&gdriver, &gmode, ""); /* read result of initialization */ errorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ { printf("Graphics error: %s\", \\ grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); /* terminate with an error code */ exit(1); } 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; poly【6】 = maxx / 2; /* 4th */ poly【7】 = maxy / 2; /* drawpoly doesn't automatically close the polygon, so we close it. */ poly【8】 = poly【0】; poly【9】 = poly【1】; /* draw the polygon */ drawpoly(5, poly); /* clean up */ getch(); closegraph(); return 0; } |
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