C++: calling function from vector object in main - c++

Question

I am trying to call printTotals() from main(). I tried person.printTotals() but it does not work because agent only calls functions within the vector STL. I checked other answers, such as C++ Calling Vectors from Function to Main and Using vector of user defined class type objects and How to create a vector of class objects in C++?.
I also checked my STL book, but this case it is not in there.
I have two questions:
Is there a way to call printTotals() outside of the constructor? Can I call it from main()? I want to keep my code clean and modular, but I am unable to access it outside of the constructor.
Each person has 3 neighbors consisting of Persons in a vector. I thought about declaring the neighbors vector like this, but was not sure:
vector<Person> neighbor
For a specific person with id = 3, how can I retrieve their second neighbor's voting status? Would it be:
person[3].neighbor[1].getPersonVotingStatus()?
This is my code:
Person.h
#include <iostream>
#include <string.h>
#include <vector>
class Person
{
public:
Person();
Person( std::vector<Person> person, maxPersons);
std::string getPersonVotingStatus(int ID);
void printTotals();
private:
std::string personName;
float personHeight;
int personID;
std::string isVoter;
vector<Person>neighbor; // <---
}
Person.cpp
#include <iostream>
#include <string.h>
#include <vector>
Person::Person()
{}
Person::Person(int pID, float pHeight, std::string pName, std::string isV)
{
personID = pID;
personHeight = pHeight;
personName = pName;
isVoter = isV;
}
Person::Person( std::vector<Person> person, int maxPersons)
{
for(int = 0; i < maxPersons; i++)
{
person[i].personID = i;
person[i].personHeight = i + 100;
person[i].personName = "testName";
if (i / 2 = 0) {
person[i].isVoter = "yes";
}
else {
person[i].isVoter = "no";
}
}
Person(person[i].personID, person[i].personHeight, person[i].personName, person[i].isVoter);
}
std::String getPersonVotingStatus( int ID)
{
return person[i].isVoter;
}
void printTotals( std::vector<Person> person)
{
int totalVoter = 0;
int totalNonvoter = 0;
for (int i = 0; i< person.size(); i++)
if (person[i].isVoter == "yes") {
totalVoter++;
}
else {
totalNonvoter++;
}
}
main.cpp
#include <iostream>
#include <string.h>
#include <vector>
int main()
{
int maxPersons = 10;
std::vector<Person> person;
Person obj( person, maxPersons);
person.printTotals(); // <--
return 0;
}

Answer 1

Try defining printTotals() as a static function:
class Person
{
public:
static void printTotals(std::vector<Person> person);
}
Then you can call it in main like this:
Person::printTotals(person);