代码之美-2[转]

来源：互联网发布：c语言pow函数编辑：程序博客网时间：2024/05/25 05:37
太极图。
 // NOTE: compile with g++ filename.cpp -std=c++11    #include <iostream> #include <cmath> #include <cstdlib> #define DIM 1024 #define DM1 (DIM-1) #define _sq(x) ((x)*(x)) // square #define _cb(x) abs((x)*(x)*(x)) // absolute value of cube #define _cr(x) (unsigned char)(pow((x),1.0/3.0)) // cube root    unsigned char GR(int,int); unsigned char BL(int,int);    unsigned char RD(int i,int j){     // YOUR CODE HERE#define LEFT (i < DIM/2)#define C1 C(DIM/2, DIM/2, DIM/2)#define C2 C(DIM/2, DIM/4, DIM/4)     return BL(i, j); } unsigned char GR(int i,int j){     // YOUR CODE HERE#define C3 C(DIM/2, 3*DIM/4, DIM/4)#define C4 C(DIM/2, DIM/4, DIM/16)#define C5 C(DIM/2, 3*DIM/4, DIM/16)     return BL(i, j); } unsigned char BL(int i,int j){     // YOUR CODE HERE#define C(x, y, r) (_sq(i - (x)) + _sq(j - (y)) < _sq((r)))     return !C1 ? 127 : C2 ? C4 ? 255 : 0 : C3 ? C5 ? 0: 255 : LEFT ? 0 :255; }    void pixel_write(int,int); FILE *fp; int main(){     fp = fopen("taiji.ppm","wb");     fprintf(fp, "P6\n%d %d\n255\n", DIM, DIM);     for(int j=0;j<DIM;j++)         for(int i=0;i<DIM;i++)             pixel_write(i,j);     fclose(fp);     return 0; } void pixel_write(int i, int j){     static unsigned char color[3];     color[0] = RD(i,j)&255;     color[1] = GR(i,j)&255;     color[2] = BL(i,j)&255;     fwrite(color, 1, 3, fp); }
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