c++ - Define const object in a header file -

i have question concerning const keyword in c++. have following class:

foot.h

class foot { public:    foot (bool isrightfoot);    const vector internfootaxis;    const vector externfootaxis;    bool isrightfoot; private:    body* body; } 

where vector class implementing basic r^3 vector operations. internfootaxis denotes vector goes center of foot (represented body object - class representing physical object) big toe. externfootaxis denotes vector goes center of foot little toe.

i want initial value of internfootaxis , externfootaxis const (because applying operators @ each iteration in graphical display main loop vectors change inner state of vector). unfortunately, values of internfootaxis(t=0) , externfootaxis(t=0) depends if considering left or right foot, therefore need declare values inside constructor of foot , not outside class.

technically want following

foot.cpp

foot::foot(bool isrightfoot) { body = new body();      if (isrightfoot)      {          internfootaxis(1,1,0);          externfootaxis(1,-1,0);      }      else      {          internfootaxis(1,-1,0);          externfootaxis(1,1,0);      } } 

is there simple way ? lot help

v.

use initializer lists:

foot::foot(bool isrightfoot)   : internfootaxis( 1, isrightfoot ? 1 : -1, 0)   , externfootaxis( 1, isrightfoot ? -1 : 1, 0) {     body = new body(); }