C + +: difference between the dot operator and the arrow operator

The point operator is used to get object members;

The arrow operator is used to get the members of the object pointed to by the pointer;

For example:

std::string S1 = "string";

std::string *p = &s1;

S1.size (); Legitimate, compiled by

S1->size ();//illegal, compilation failed

P.size (); Illegal, compilation failed

P->size (); Legitimate, compiled by

In fact, p->size () is equivalent to (*p). Size ().

C + +: difference between the dot operator and the arrow operator