c++ - How can I write a function that, given a pointer to a map, returns a pointer to a specific element in the map? -

i have map:

std::map<int,float> m1; 

i want pass pointer map function iterate on map , return pointer particular element in map based on condition.

float *foo(map<int,float> *m1){   float *result;   for(map<int,float>::iterator = m1->begin(); != m1->end(); it++)     {       if (condition)         {           result = &(it->second);           break;         }     }   return result; } 

this code did not compile. i'm having trouble seeing pointer , isn't. how passing pointer map affect iterator loop ?

thanks!

don't write own function, use standard library : std::find_if looking :

auto = std::find_if (m1.begin(), m1.end(), testfunction); if(it != m1.end())     ...