Help with calculation with inflation code

[damianbloch49]

#include <iostream>
#include <iomanip>
#include <string>
#include <cmath>


using namespace std;

void getInput(double& currPrice, double& oneYearPrice, double& twoYearPrice);
void calcInflation(double currPrice, double oneYearPrice, double twoYearPrice, double& infRate1, double& infRate2);

void main()
{
double infRate1;
double infRate2;

//int Years, Price, Inflation;
double currPrice, oneYearPrice, twoYearPrice;


getInput(currPrice, oneYearPrice, twoYearPrice);

calcInflation(currPrice, oneYearPrice, twoYearPrice, infRate1, infRate2);
}

void getInput(double& currPrice, double& oneYearPrice, double& twoYearPrice)
{


cout << "Enter the current price of the item: ";
cin >> currPrice;
cout << endl;

cout << "Enter the price of the item one year ago: ";
cin >> oneYearPrice;
cout << endl;

cout << "Enter the price of the item two years ago: ";
cin >> twoYearPrice;
cout << endl;
}


void calcInflation(double currPrice, double oneYearPrice, double twoYearPrice, double& infRate1, double& infRate2)
{
//twoYearPrice =(twoYearPrice - oneYearPrice)/ oneYearPrice;



infRate1 =(currPrice - oneYearPrice)/ oneYearPrice;
infRate2 =(currPrice - twoYearPrice)/ twoYearPrice;


}



I need help on the last part where it says
infRate1 =(currPrice - oneYearPrice)/ oneYearPrice;
infRate2 =(currPrice - twoYearPrice)/ twoYearPrice;

I don't understand what to do where it is to calculate the inflation rate.

heres a sample output:
Enter the current price of the item: 100.00

Enter the price of the item one year ago: 92.00

Enter the price of the item two years ago: 82.75

Current year inflation: 0.09
Inflation one year ago: 0.11
Inflation is not increasing.