c++ - Correctly Initialize Map of Pointers - map<p*, p*> -

i'm pretty new c++ , looking related q/a on didn't find proper answer issue.

i'm struggling trying instantiate new map of pointers map<p1*, p2*>.

so far, tried:

std::map<mytype*, mytype*> mapofvertices = new std::map<mytype, mytype>; 

or:

std::map<mytype*, mytype*> mapofvertices = new std::map<mytype*, mytype*>; 

but i'm getting:

error: conversion ‘std::map*’ non-scalar type ‘std::map’ requested std::map mapofvertices = new std::map;

i'm confused since managed initialize other objects like:

mytype* myobj = new mytype; 

i'm sorry if question bit trivial. in advance.

you don't need allocate map object on heap, can create on stack.

std::map<mytype*, mytype*> mapofvertices; 

that code sufficiently creates map. if, whatever reason, did want pointer map (which involves allocating on heap), you'd need change declaration to

std::map<mytype*, mytype*> * mapofvertices = new std::map<mytype*, mytype*>; 

(note star between type , variable name)

based on code you've provided, , own admission, indeed novice c++, most experienced c++ programmers know work raw pointers when absolutely necessary, , use case not represent such case. strongly, recommend pick book. there's great listing here suggestions.