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user:mgardne8:portfolio:notescrap [2014/09/02 09:34] – created mgardne8user:mgardne8:portfolio:notescrap [2014/09/02 10:34] (current) – mgardne8
Line 1: Line 1:
-:D:D:D:D:D:D:D:D:D:D:D:D:D+__Pointers__ 
 +  int = 4 bytes 
 +  short = 2 bytes 
 + 
 +  Int    a =  5; (43;44;45;46) 
 +  Int    b =  6; (47;50;51;52) 
 +  Short  j =  2; (53;54) 
 +  Short  k =  1; (55;56) 
 +  Int   *c = &a; (57;60;61;62;63;64;65;66) 
 +                 [Contains Address for Int a; (43;44;45;46) 
 +                 [* = Dereferencing operator] 
 +  Short  q = 77; (67;70) 
 + 
 +   |0|1|2|3|4|5|6|7| 
 +  ------------------ 
 +  0| | | | | | | | | 
 +  ------------------ 
 +  1| | | | | | | | | 
 +  ------------------ 
 +  2| | | | | | | | | 
 +  ------------------ 
 +  3| | | | | | | | | 
 +  ------------------ 
 +  4| | | |a|a|a|a|b| 
 +  ------------------ 
 +  5|b|b|b|j|j|k|k|c| 
 +  ------------------ 
 +  6|c|c|c|c|c|c|c|q| 
 +  ------------------ 
 +  7|q| | | | | | | | 
 +  ------------------ 
 + 
 +---------------------------- 
 +  Grid - 1byte = 8bits 
 +---------------------------- 
 +  bc -l 
 +  2^8  = 256 
 +  2^16 = 65536 
 +  2^32 = 4294967296 
 +  2^64 = 18446744073709551616 
 +--------------------------- 
 +  X64 0x0000000000000000 
 +--------------------------- 
 + 
 +  int g[4]; 
 +  int *g=(int *)malloc(sizeof(int)*4); 
 +   
 +  g[0]   =   7; 
 +  g[1]   =   3; 
 +  *(g+2) =  13; 
 +  g[2]   =  13; 
 +   
 +-------------------- 
 + 
 + 
 + 
 + 
 + 
 + 
 + 
user/mgardne8/portfolio/notescrap.1409664864.txt.gz · Last modified: 2014/09/02 09:34 by mgardne8