How to pass optional arguments to a method in C++? -

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how pass optional arguments method in c++ ? code snippet...

here example of passing mode optional parameter 

void myfunc(int blah, int mode = 0) {  if(mode == 0)   do_something();  else   do_something_else(); }

you can call myfunc in both ways , both valid

myfunc(10); //mode set default 0 myfunc(10, 1);//mode set 1

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