#include#define PI 3.1415926

#define ESC 0x011b

float s0=-1,m0=-1,h0=-1;

main()

{

int gdriver, gmode,key,i=3;

char H[10];

float n;

gdriver = DETECT;

initgraph(&gdriver, &gmode, "");/*初始化图形界面*/

setbkcolor(YELLOW);

setcolor(BLUE);

setfillstyle(1,1);

circle(405,175,22);

floodfill(405,175,BLUE);

setfillstyle(1,1);/*设置填充形式为红色实填充*/

circle(235,175,22);

floodfill(235,175,BLUE);

setfillstyle(1,12);

circle(320,240,85);

circle(320, 240, 82);

floodfill(403,240,BLUE);

for(n=0;n<=2*PI;n+=PI/30)

{

putpixel(320+80 * cos(-n), 240+80 * sin(-n),GREEN); /*画标识分钟的小刻度*/

}

for(n=0;n<=2*PI;n+=PI/6)

{

setcolor(BLUE);

circle(320+80 * cos(-n), 240+80 * sin(-n),1); /*画标识小时的大刻度*/

setfillstyle(SOLID_FILL,LIGHTBLUE);

floodfill(320+80 * cos(-n), 240+80 * sin(-n),BLUE);

}

setcolor(GREEN);

for(n=0;n<=2*PI;n+=PI/6)

{

itoa(i,H,10);

outtextxy(317+73 * cos(-n), 237+73 * sin(-n),H);/*画标识小时的大刻度对应的数字*/

i--;

if(i<1)

i+=12;

}

while(!kbhit())

{

timer();

delay(1000);

}

key=bioskey(0);/*接收键盘按键*/

if(key==ESC)

{

closegraph();

exit(0);

}

getch();

closegraph();/*退出图形界面*/

}

timer()

{

struct tm *when;

float s,m1,h1;

int h,m;

time_t now;

time(&now);

when= localtime(&now);

h=when->tm_hour;

m=when->tm_min;

s=when->tm_sec;

h1=(h+(m*60+s)/3600)*PI/6-PI/2;

m1=(m+s/60)*(PI/30)-PI/2;

if(s0!=(-1) && m0!=(-1) && h0!=(-1))

{setcolor(0);

line(320,240,320+45*cos(h0),240+45*sin(h0));

line(320,240,320+55*cos(m0),240+55*sin(m0));

line(320,240,320+65*cos((s0)*(PI/30)+PI/2),240+65*sin((s0)*(PI/30)+PI/2));

}

setcolor(RED);

line(320,240,320+45*cos(h1),240+45*sin(h1));

setcolor(LIGHTGRAY);

line(320,240,320+55*cos(m1),240+55*sin(m1));

setcolor(BLUE);

line(320,240,320+65*cos((s)*(PI/30)+PI/2),240+65*sin((s)*(PI/30)+PI/2));

s0=s;

m0=m1;

h0=h1;

}

使用说明

运行程序，会出现如图4.1所示的界面，显示当前系统时间。

图4.1 初始界面

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