// James Ruska

// COSC 1436 GE #5 Fall 2013

// Filename: GE5Part2.cpp

// Displays a calendar

#include<iostream>

#include<iomanip>

#include<math.h>

#include<ctime>

#include<algorithm>

using namespace std;

double calculateMonthlyPayment(double loan_amount, double yearly_interest_rate, int years_until_due){

if ( !(loan_amount >= 1 && loan_amount <= 1000000)

|| !(yearly_interest_rate >= 2.0 && yearly_interest_rate <= 20.0)

|| !(years_until_due >= 5 && years_until_due <= 30)) return -1;

int number_of_payments = years_until_due * 12;

yearly_interest_rate /= 1200;

return (yearly_interest_rate + (yearly_interest_rate / (pow(1+yearly_interest_rate, number_of_payments)-1))) * loan_amount;

}

int getStartDay(int month, int day, int year){

tm time_in = { 0, 0, 0, day, month-1, year - 1900 };

time_t time_temp = mktime(&time_in);

return (localtime(&time_temp))->tm_wday;

}

void displayCalendarDays(int month, int total_days){

int start_day=getStartDay(month,1, 2014);

char months[][13] = {"", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};

if (!(start_day >= 0 && start_day <= 6) || !(total_days >= 1 && total_days <= 31)){

if (!(start_day >= 0 && start_day <= 6)) cout << "Error: First parameter to displayCalendarDays() must be between 0 and 6 inclusive! " << start_day << endl;

if (!(total_days >= 1 && total_days <= 31)) cout << "Error: Second parameter to displayCalendarDays() must be between 1 and 31 inclusive! "<< total_days << endl;

return;

}

cout << "<table class=\"invisibleTable\"><tr><td><table><tr><th colspan=\"7\">" << months[month] << "</th></tr>" << endl << "<tr><td>Sun</td><td>Mon</td><td>Tue</td><td>Wed</td><td>Thu</td><td>Fri</td><td>Sat</td></tr>\n<tr>" << endl;

int i;

for (i=1; i<=(total_days+start_day); i++)

if (i<(start_day+1)) cout << "<td></td>";

else cout << setw(3) << "<td>" << (i-start_day) << "</td>" << ((i%7==0) ? "</tr><tr>\n" : "");

i--;

for (;i%7!=0; i++) cout << "<td></td>";

cout << "</tr></table></td><td></td></tr></table>";

cout << endl << endl;

}

int main(){

int days[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

for( int i=1; i<13; i++){

displayCalendarDays(i, days[i]);

}

system("pause");

}

void generateLotteryNumbers(int lotteryNumbers []){

for(int counter=0; counter<5; counter++)

do{ lotteryNumbers[counter] = rand() % 50 + 1; }

while (counter!=0 && find(lotteryNumbers, &lotteryNumbers[counter], lotteryNumbers[counter]) < &lotteryNumbers[counter]);

}