<TABLE borderColor=#cccccc cellSpacing=0 cellPadding=3 bgColor=#ffffff border=4><TBODY><TR><TD><P><TABLE style=TABLE-LAYOUT: fixed; WORD-BREAK: break-all height=* width=98% align=center border=0><TBODY><TR><TD style=FONT-SIZE: 9pt; LINE-HEIGHT: 12pt width=100% height=100%><BR><STYLE>FIELDSET{padding:0px 0PX 30PX 30PX;}LEGEND{color:red;font-weight:bold;margin-bottom:25px;}</STYLE><FIELDSET><LEGEND>此源码由BC-CN论坛C源码染色机染色</LEGEND><FONT color=#090909>程序作者：knocker<br> BC-CNCode BUG版 如有差错请见谅</FIELDSET><BR><DIV align=right><FONT color=#000066></FONT></DIV></TD></TR></TBODY></TABLE></P></TD></TR></TBODY></TABLE>

Test：

´ËÔ´ÂëÓÉBC-CNÂÛ̳CÔ´ÂëȾɫ»úȾɫ ³ÌÐò×÷Õߣºknocker BC-CNCode BUG°æ ÈçÓвî´íÇë¼ûÁ /* Hit.cpp */ #include <stdio.h> #include <stdlib.h> #include <conio.h> #include <dos.h> #include <bios.h> #include <graphics.h> #define SCREEN_HEIGHT 480 #define SCREEN_WIDTH 640 static int dx=1,dy=1; static unsigned int r=20; static unsigned int cx=0,cy=0; unsigned int randrange(int start,int end) { randomize(); unsigned int ret=start+rand() % (end-start) + 1; return ret; } void igdrv(void) { int gdriver = DETECT, gmode, errorcode; initgraph(&gdriver, &gmode, ""); errorcode = graphresult(); if (errorcode != grOk) { printf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); exit(1); /* return with error code */ } } void draw_border(void) { setcolor(WHITE); line(0,0,SCREEN_WIDTH-1,0); line(0,0,0,SCREEN_HEIGHT-1); line(0,SCREEN_HEIGHT-1,SCREEN_WIDTH-1,SCREEN_HEIGHT-1); line(SCREEN_WIDTH-1,0,SCREEN_WIDTH-1,SCREEN_HEIGHT-1); } void draw_ball(void) { cx=randrange(r+1,SCREEN_WIDTH-2-r); cy=randrange(r+1,SCREEN_HEIGHT-2-r); setcolor(WHITE); circle(cx,cy,r); } void direction(void) { randomize(); dx = (rand() % 100+1) < 50 ? dx : -dx; dy = (rand() % 100+1) < 50 ? dy : -dy; } void reflect(void) { if(cx==r+1||cx==SCREEN_WIDTH-r-2) dx=-dx; if(cy==r+1||cy==SCREEN_HEIGHT-r-2) dy=-dy; } int main() { int flag=1,key; igdrv(); // draw the border draw_border(); // first time , draw the ball draw_ball(); // random a direction of action direction(); do { do { delay(2); if(flag) { setcolor(BLACK); circle(cx,cy,r); cx+=dx; cy+=dy; setcolor(WHITE); circle(cx,cy,r); if((cx==r+1||cx==SCREEN_WIDTH-r-2)||(cy==r+1||cy==SCREEN_HEIGHT-r-2)) { flag=0; } } else { reflect(); flag=1; } } while(!bioskey(1)); // Press esc to exit the program. } while((key=bioskey(0))!=0x11b); closegraph(); return 0; }

[此贴子已经被作者于2007-7-31 13:30:52编辑过]

很棒啊,最好把已定义的和未定义的也用不同颜色分开.如:
int main()
{
int i;
printf("%d",i);
}
int main()
{
printf("%d",i);
}
虽然很难实现,但Knocker你一定有办法的．

果然是强！