| #include <stdio.h> | |
| #define SQ(x) (x)*(x) | |
| #define M0(x,y) SQ(x)+SQ(y)<4?0:0xe0 | |
| #define M1(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M0(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0)):0xc0 | |
| #define M2(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M1(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0xa0 | |
| #define M3(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M2(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0x80 | |
| #define M4(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M3(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0x60 | |
| #define M5(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M4(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0x40 |
here-here is like history but it saves the time you ran a command and the directory you were in when you ran it.
Running here tells you all the commands you ran in this directory even if you were on a different server.
I commonly wonder how I made a file (and maybe why). Sometimes I try looking in my history (using the history command).
This makes that easier by clearing out some of the noise.
