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I have a problem with my syntax I believe

drakus (1)
I have an assignment to write a program that will calculate the amount of minutes that I have been alive given information inputted by the user, but for some reason all of my results have ended up as 0 so far (it has compiled successfully). I am not sure if the problem lies within the computations, or the struct that I have declared and I would greatly appreciate any assistance or hints that you might have.

My source code is below.

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#include <iostream>
#include <iomanip>

using namespace std;


struct birthType{
	//birth time variables
	int minuteOfBirth;
	int hourOfBirth;
	int dayOfBirth;
	int monthOfBirth;
	int yearOfBirth;
	
	//current time variables
	int currentMinute;
	int currentHour;
	int currentDay;
	int currentMonth;
	int currentYear;
};

//function prototypes
void getInformation(birthType Alex);
int calculateMinutes(birthType Alex);
void printMinutesAlive(int elapsedMinutes);

birthType Alex;

//constants
const int DAYS_IN_YEAR = 365;
const int MONTHS_IN_YEAR = 12;
const int AVERAGE_DAYS_IN_MONTH = 30;
const int HOURS_IN_DAY = 24;
const int MINUTES_IN_HOUR = 60;

//Return Variable
int elapsedMinutes;


int main(){

	 getInformation(Alex);
	 calculateMinutes(Alex);
	 printMinutesAlive(elapsedMinutes);

	 system("pause");

	 return 0;

}


void getInformation(birthType Alex){ //This will gather information needed in calculations

	cout << "Please input your Year of birth: " << endl << endl;
	cin >> Alex.yearOfBirth;
	cout << "Please input your Month of birth: " << endl << endl;
	cin >> Alex.monthOfBirth;
	cout << "Please input your Day of birth: " << endl << endl;
	cin >> Alex.dayOfBirth;
	cout << "Please input the hour of your birth (using 24 hr format): " << endl << endl;
	cin >> Alex.hourOfBirth;
	cout << "Please input the minute that you were born (out of the hour): " << endl << endl;
	cin >> Alex.minuteOfBirth;
	cout << "Please input the current Year: " << endl << endl;
	cin >> Alex.currentYear;
	cout << "Please input the current Month: " << endl << endl;
	cin >> Alex.currentMonth;
	cout << "Please input the current Day: " << endl << endl;
	cin >> Alex.currentDay;
	cout << "Please input the current hour (using 24 hr format): " << endl << endl;
	cin >> Alex.currentHour;
	cout << "Please input the current minute (out of the hour): " << endl << endl;
	cin >> Alex.currentMinute;

}

int calculateMinutes(birthType Alex){ //This will calculate the minutes that I have spent alive.

	int elapsedYears;
	int elapsedMonths;
	int elapsedDays;
	int elapsedHours;
	int elapsedMinutes;


	elapsedYears = Alex.yearOfBirth - Alex.currentYear;
	elapsedMonths = ((MONTHS_IN_YEAR - Alex.monthOfBirth) + (MONTHS_IN_YEAR * (elapsedYears - 1)) + Alex.currentMonth);
	elapsedDays = ((elapsedMonths * AVERAGE_DAYS_IN_MONTH) + (AVERAGE_DAYS_IN_MONTH - Alex.dayOfBirth) + Alex.currentDay);
	elapsedHours = (((elapsedDays * HOURS_IN_DAY) - HOURS_IN_DAY) + Alex.currentHour + (HOURS_IN_DAY - Alex.hourOfBirth));
	elapsedMinutes = ((elapsedHours * MINUTES_IN_HOUR) + (MINUTES_IN_HOUR - Alex.minuteOfBirth) + Alex.currentMinute);



	return elapsedMinutes;
}

void printMinutesAlive(int elapsedMinutes){

	cout << endl << endl;

	cout << "The amount of minutes that you have been alive is: " << elapsedMinutes << endl << endl; 

}


Thanks for your time and assistance!
Last edited on
helios (17506)
getInformation() takes a parameter by value, so it doesn't initialize Alex.

The date difference algorithm is probably highly inexact, also. You should test it with pathological cases, such as diff(2015-01-01, 2014-12-31).
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