Sharing data between two arduinos

i have structure holds bunch of data, unsigned ints , unsigned longs.  i'd send of arduino. 

does know if arduino compiler guarantees memory layout same?  afaik c (at least c99 compliant c) don't know c++.

in other words, if declare struct:

code: [select]


struct
{
  unsigned long lastupdated;
  unsigned int ahin, ahout;
  unsigned long amsecin, amsecout;
  unsigned int vmin, vmax;
  unsigned int vavg;
  unsigned int imin, imax;
  unsigned char tmin, tmax;
  unsigned char chargemin, chargemax;
  unsigned long cnowmsec;
  unsigned int socload, soccalc, socsense;
} history;


can send out comm port binary blob , receive on other end binary blob , stick identical structure?  (with appropriate error checking , such...)

you can't send struct "through comm port". serial data can sent out byte byte, if want send entire struct, should modify struct use union appropriate sized byte array.

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