pass map as reference c++
#include<map>
void function2(std::map<int, int> &temp_map); //forward declaration
void function1(){
std::map<int, int> my_map; //automatic variable
//no need to make it pointer!
function2(my_map);
}
void function2(std::map<int, int> &temp_map){
//do stuff with the map
}