Help with alphabetical names

[jzm5459]

I stuck on how to out the first name enter lexographically. Im suppose to write a string function begin that sends the output to main. Any help would be appreciated.

#include <iostream>
#include <string>

using namespace std;

void begin (string nameA, string nameB)

{
	nameA = 
	nameB =
	

	if (nameA < nameB ||  nameA == nameB)
	{
		cout<<name1;
	}
	else if (nameB > nameA)
	{
		cout<<name2;
	}
	else if (nameB == nameA)
	{
		cout<<name3;
	}
	else
	{ 
		cout<<name4;
	}
	
	void charfunct(string name1, string name2, string name3, string name4)
		

int main()
{
	
	

	string name1, name2, name3, name4; 

		cout<<"Please enter name 1: ";
		cin>> name1;
		cout<<"Please enter name 2: ";
		cin>> name2;
		cout<<"Please enter name 3: ";
		cin>> name3;
		cout<<"Please enter name 4: ";
		cin>> name4;
		
		cout<<before<<endl;

}