main.cpp

#include <iostream>
#include <string>

using namespace std;

#include "PaceCalculator.h"

int main(int argc, const char * argv[]) {
	cout.setf(ios::fixed);
	cout.setf(ios::showpoint);
	cout.precision(2);
	
	int input = 0;
	
	PaceCalculator paceCalculator;
	
	paceCalculator.programIntent();
	paceCalculator.userPrompt();
	
	cin >> input;
	
	if (input == 1) {
		double value = 0.0;
		paceCalculator.promptForKPH();
		cin >> value;
		cout << paceCalculator.convertToMPH(value) << " KPH" << endl;
	} else  if (input ==2) {
		int value1, value2;
		paceCalculator.promptForMinutes();
		cin >> value1;
		paceCalculator.promptForSeconds();
		cin >> value2;
		cout << paceCalculator.convertToMPH(value1, value2)  << " MPH" << endl;
	} else {
		cout << "Enter a valid value" << endl;
	}	
	
    return 0;
}

PaceCalculator.cpp

#include <string>

using namespace std;

#include "PaceCalculator.h"

double PaceCalculator::convertToMPH (double kph) {
	
	return kph / KILOS_IN_MILE;
}

double PaceCalculator::convertToMPH (int minutes, int seconds) {
	int timeInseconds = (minutes * 60) + seconds;
	double resultInMPH = SECONDS_IN_HOUR / double(timeInseconds);
	
	return resultInMPH;
}

void PaceCalculator::userPrompt () {
	cout << "\n\n---- INSTRUCTIONS ----" << endl;
	cout << "1 - Enter 1 for your \npace in KPH" << endl;
	cout << "2 - Enter 2 for your \nminutes or seconds per\nmile.\n" << endl;
}

void PaceCalculator::programIntent() {
	cout << "***********************" << endl;
	cout << "*** PACE CALCULATOR ***" << endl;
	cout << "***********************" << endl;
	cout << endl;
	cout << "Calculate your pace in " << endl;
	cout << "miles per hours or your" << endl;
	cout << "pace in kph" << endl;
}

void PaceCalculator::promptForKPH () {
	cout << "\nEnter your pace in KPH" << endl;
}

void PaceCalculator::promptForMinutes () {
	cout << "\nEnter your minutes" << endl;
}

void PaceCalculator::promptForSeconds () {
	cout << "\nEnter your seconds" << endl;
}

PaceCalculator.h

#ifndef PaceCalculator_h
#define PaceCalculator_h

#include <iostream>
#include <string>

using namespace std;

#include <stdio.h>

class PaceCalculator {
public:
	const double KILOS_IN_MILE = 1.61;
	const int SECONDS_IN_HOUR = 3600;
	double convertToMPH (double);
	double convertToMPH (int, int);
	void programIntent ();
	void userPrompt ();
	void promptForKPH ();
	void promptForMinutes ();
	void promptForSeconds ();
private:
	
};

#endif