C语言代码输入练习

贡献者：user0113

类别：代码 时间：2019-07-27 10:12:01 收藏数：38 评分：-0.5

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// src: codebus, yangw

// build: vc6, easyx 2011

//

#include

#include

#define ITERATIONS 1000

#define MAXCOLOR 64

struct COMPLEX

{double re;

double im;

};

COMPLEX operator * (COMPLEX a, COMPLEX b)

{COMPLEX c;

c.re = a.re * b.re - a.im * b.im;

c.im = a.im * b.re + a.re * b.im;

return c;

}COMPLEX operator + (COMPLEX a, COMPLEX b)

{COMPLEX c;

c.re = a.re + b.re;

c.im = a.im + b.im;

return c;

}int Color[MAXCOLOR];

void InitColor()

{int h1 = 240, h2 = 30;

for(int i=0; i

{Color[i] = HSLtoRGB((float)h1, 1.0f, i * 2.0f / MAXCOLOR);

Color[MAXCOLOR-1-i] = HSLtoRGB((float)h2, 1.0f, i * 2.0f / MAXCOLOR);

}}void Draw(double fromx, double fromy, double tox, double toy)

{COMPLEX z, c;

int x, y, k;

for(x = 0; x < 640; x++)

{c.re = fromx + (tox - fromx) * (x / 640.0);

for(y = 0; y < 480; y++)

{c.im = fromy + (toy - fromy) * (y / 480.0);

z.re = z.im = 0;

for(k = 0; k < ITERATIONS; k++)

{if ( z.re * z.re + z.im * z.im > 4.0 ) break;

z = z * z + c;

}putpixel(x, y, (k >= ITERATIONS) ? 0 : Color[k % MAXCOLOR]);

}}}int main()

{initgraph(640, 480);

InitColor();

double fromx, fromy, tox, toy;

fromx = -2.1; tox = 1.1;

fromy = -1.2; toy = 1.2;

Draw(fromx, fromy, tox, toy);

MOUSEMSG m;

bool isLDown = false;

int selfx, selfy, seltx, selty;

while(!kbhit())

{m = GetMouseMsg();

switch(m.uMsg)

{case WM_MBUTTONUP:

fromx = -2.1; tox = 1.1;

fromy = -1.2; toy = 1.2;

Draw(fromx, fromy, tox, toy);

break;

case WM_MOUSEMOVE:

if (isLDown)

{rectangle(selfx, selfy, seltx, selty);

seltx = m.x;

selty = m.y;

rectangle(selfx, selfy, seltx, selty);

}break;

case WM_LBUTTONDOWN:

setcolor(WHITE);

setwritemode(R2_XORPEN);

isLDown = true;

selfx = seltx = m.x;

selfy = selty = m.y;

rectangle(selfx, selfy, seltx, selty);

break;

case WM_LBUTTONUP:

rectangle(selfx, selfy, seltx, selty);

setwritemode(R2_COPYPEN);

isLDown = false;

seltx = m.x;

selty = m.y;

if (selfx == seltx || selfy == selty) break;

int tmp;

if (selfx > seltx) {tmp = selfx; selfx = seltx; seltx = tmp;}

if (selfy > selty){tmp = selfy; selfy = selty; selty = tmp;}

if ( (seltx - selfx) * 0.75 < (selty - selfy) )

{selty += (3 - (selty - selfy) % 3);

selfx -= (selty - selfy) / 3 * 4 / 2 - (seltx - selfx) / 2;

seltx = selfx + (selty - selfy) / 3 * 4;

}else

{seltx += (4 - (seltx - selfx) % 4);

selfy -= (seltx - selfx) * 3 / 4 / 2 - (selty - selfy ) / 2;

selty = selfy + (seltx - selfx ) * 3 / 4;

}double f, t;

f = fromx + (tox - fromx) * selfx / 640;

t = fromx + (tox - fromx) * seltx / 640;

fromx = f;

tox = t;

f = fromy + (toy - fromy) * selfy / 480;

t = fromy + (toy - fromy) * selty / 480;

fromy = f;

toy = t;

Draw(fromx, fromy, tox, toy);

break;

}}getch();

closegraph();

}

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