visual studio - Finding items inside a vector of map given a key (C++) -

i trying debug coding (c++ / quantlib) using vector of maps. find item inside map in turn inside vector. caught error.

input:

vector<map <date, real> > simulatedprices_;    // vector containing 1000 maps vector<date> cds_maturities_; 

private variable:

map <date, real> pricepathj;    // reading each map in vector real w_t_;    // 

coding:

for (int j = 0; j < no_of_paths; j++) {     pricepathj = simulatedprices_[j];     (int = 0; <= itenor_; i++) {    //itenor number of element inside vector cds_maturities_         startdate = ......;         enddate = ......;         w_t_ = pricepathj.find(cds_maturities_[i]);    // error in pricepathj saying there no conversion function iterator ... pair<date, real> real.          ...... 

did commit mistakes or if there's pointer type overlooked in above coding? thanks.

remarks: variable type real simular type double

you can use simple loop , use map's find() function this. return first real matches

real findreal(const std::vector<std::map<date, real>> & data, const date & finddate) {     (auto&& e : data)     {         auto = e.find(finddate);         if (it != e.end())             return it->second;     }     return some_value_if_not_found; }