Help with vectors?

[ccwtree11]

My program needs to read values from a file into a vector and output which are medians. However, I am not getting any output. Any idea what's wrong?

#include <iostream>
#include <string>
#include <fstream>
#include <vector>

using namespace std;

void doCalculation ( istream & infile )
{
	vector<double> median;
	
	if (infile) 
	{        
    	double value;

    	// read the elements in the file into a vector  
    	while ( infile >> value ) 
		{
        	median.push_back( value );
    	}
	}
	
	vector<double>::iterator i, j;
	unsigned int smaller = 0, larger = 0;
	
	// compare each value in the vector to each other
	for ( i = median.begin(); i < median.end(); i++ )
	{
		for ( j = median.begin(); j < median.end(); j++ )
		{
			if ( *i > *j )
				smaller++;
			else
				larger++;
		}
		
		if ( 2*smaller <= median.size() && 2*larger <= median.size() )
			cout << *i << " is a median." << endl;
	}
}

int main()
{
	string filename;

	cout << "Enter the name of the file ('end' to quit): " << endl;
	cin >> filename;

	while ( filename != "end" )
	{
		ifstream infile ( filename );

		if ( infile )
		{
			doCalculation ( infile );
		}
		else
		{
			cout << filename << " failed to open" << endl;
		}

		cout << endl << "Enter the name of the file ('end' to quit): " << endl;
		cin >> filename;
	}

return 0;
}

[ccwtree11]

Okay I'm pretty sure my error is that I'm not clearing smaller and larger after each loop. How do I do that?