Creating vector of boost dynamic_bitset in C++ -


i want create array of dynamic_bitsets. created vector of dynamic_bitset using,

vector<boost::dynamic_bitset<>> v;

how can specify size of each of these dynamic_bitsets i.e. v[0], v[1] etc? in general case, specify size through constructor.

boost::dynamic_bitset<> x(3);

this line

vector<boost::dynamic_bitset<>> v;

create empty vector. instead have requested filled default entries have same value, 1 does

vector<int> v(n, 1);

to create vector n entries 1 

vector<boost::dynamic_bitset<>> v( n, boost::dynamic_bitset<>(3) ) ;

to have contain n boost::dynamic_bitset<>s 3 bits.

if vector contains enough elements should able set v[i] different size

v[i] = boost::dynamic_bitset<>( 100 ) ;

alternative create empty vector , use v.push_back(boost::dynamic_bitset<>(42)) add correctly sized elements.


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