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putpixel
鎖定
其中(x,y)是座標,pixelcolor是像素的顏色
- 外文名
- putpixel
- 功 能
- 在指定位置畫一像素
- 程序例
- #include graphics.h>
- 用 法
- void far putpixel
函數名: putpixel
功 能: 在指定位置畫一像素
用 法: void far putpixel (int x, int y, int pixelcolor);
程序例:
#include <graphics.h> #include <stdlib.h> #include <stdio.h> #include <conio.h> #include <dos.h> #define PIXEL_COUNT 1000 #define DELAY_TIME 100 /* in milliseconds */ int main(void) { /* request autodetection */ int gdriver = DETECT, gmode, errorcode; int i, x, y, color, maxx, maxy, maxcolor, seed; /* 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(); exit(1); /* terminate with an error code */ } maxx = getmaxx() + 1; maxy = getmaxy() + 1; maxcolor = getmaxcolor() + 1; while (!kbhit()) { /* seed the random number generator */ seed = random(32767); srand(seed); for (i=0; i<PIXEL_COUNT; i++) { x = random(maxx); y = random(maxy); color = random(maxcolor); putpixel(x, y, color); } delay(DELAY_TIME); srand(seed); for (i=0; i<PIXEL_COUNT; i++) { x = random(maxx); y = random(maxy); color = random(maxcolor); if (color == getpixel(x, y)) putpixel(x, y, 0); } } /* clean up */ getch(); closegraph(); return 0; }
需要注意的是,如果沒有專門添加頭文件和庫文件,該函數並不能夠在vc中使用。