vector output to text file

[sistasweetpea]

Hi. I'm a computer science student studying c++. My professor gave an assignment where I had to write a program using arrays then convert the program to use vectors. The program had to input information from a text file then alter it and output it to another text file. I finally got it to compile, but the new text file is empty. Help me out please

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

using namespace std;

void getInfo(vector<string>, vector<int>);
void outputInfo(vector<string>, vector<int>, vector<int>);

const int CURRENT_YEAR = 2012;

int main()
{
	
	vector<string> names;
	vector<int> birthYear;
	vector<int> age;

	getInfo(names, birthYear);
	outputInfo(names, birthYear, age);

	return 0;
}

void getInfo(vector<string> firstName, vector<int> year)
{
	ifstream inputFile;
	int count = 0;
	string names;
	int years;

	inputFile.open("namesandyears.txt");
	
	while (count < 9)
	{
		inputFile >> names;
		firstName.push_back(names);
		inputFile >> years;
		year.push_back(years);
		count++;
	}
	inputFile.close();
}

void outputInfo(vector<string> firstName, vector<int> year, vector<int> finalAge)
{
	ofstream outputFile;
	int count = 0;
	int maxNum;
	int age;

	maxNum = firstName.size();

	outputFile.open("birthdayoutput.txt");

	for (count = 0; count < maxNum; count++)
	{
		age = CURRENT_YEAR - year[count];
		finalAge.push_back(age);
	}

	for (count = 0; count < maxNum; count++)
	{
		outputFile << firstName[count] << "\t" << year[count] << "\t";
		outputFile << finalAge[count] << endl;
	}
	
	outputFile.close();
}

[vlad from moscow]

It is empty because the vectors you are trying to write into the file are also empty.

[sistasweetpea]

I thought lines 35 - 42 were putting the information from the first file into the vectors. What did I do wrong?

[vlad from moscow]

You are filling local variables of the function because its parameters are local veriables. And after exiting the function they are destroyed. You should declare parameters as references to vectors.

[sistasweetpea]

Thank you!