Doubt in accessing class members

#1

I’m confused when we use ’ . ’ ( line 138 ) and when we use ’ -> ’ ( line 142 ). Please clarify this. Thanks in advance.

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#2 
. dot is used to access the property of objects
and -> arrow is used to access the property of pointer

Pair p; // p is object of class Pair
so to access its property we use .(dot) 
like p.daimeter , p.height etc

node*root;  //root is pointer of class node
hence to access it's property we will use ->(arrow)
like root->left ,root->right etc.

i hope you understand the concept
if your doubt is resolved plz mark it as resolved from your side
else feel free to ask

#3

Thanks for the clarification. I’m closing the doubt.

#4

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#5

plz give feedback it’s imp
thanks