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drawpoly
鎖定
函數drawpoly用當前繪圖色、線型及線寬,畫一個給定若干點所定義的多邊形。
- 中文名
- drawpoly
- 實 質
- 函數
- 第一個參數
- 是多邊形的頂點數
- 功 能
- 畫多邊形
- 適用範圍
- 繪圖色、線型及線寬
drawpoly簡介
函數名: drawpoly
第一個參數,是多邊形的頂點數
第二個參數,該數組存放着多邊形所有頂點(x,y)座標值,即一系列整數對
用 法: void far drawpoly(int numpoints, int far *polypoints);
drawpoly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\n", \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;
- 詞條統計
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- 瀏覽次數:次
- 編輯次數:14次歷史版本
- 最近更新: a2026232403