/*
ACTION 4-1 (ACT04_01.CPP)
OUTPUT:	A TABLE MENU SHOWS THE LOAN AMOUNT, INTEREST, TERM, AND MONTHLY PAYMENT.
        		USER PROMPTS AS NECESSARY.

INPUT:		LOAN AMOUNT, INTEREST RATE, AND TERM.

PROCESSING:	PAYMENT = PRINCIPLE * RATE/1-(1+RATE) -TERM
	
WHERE: 	PRINCIPLE IS THE AMOUNT OF THE LOAN.
            		RATE IS A MONTHLY INTEREST RATE IN DECIMAL FORM.
            		TERM IS THE NUMBER OF MONTHS OF THE LOAN.
*/


//PREPROCESSOR DIRECTIVES
#include <iostream>	//FOR cin and cout
#include <string>	//FOR string CLASS
#include <math.h>  	//FOR pow()

using namespace std;	//REQUIRED WHEN INCLUDING iostream

//MAIN FUNCTION
int main()
{
    //DEFINE AND INITIALIZE OBJECTS AND VARIABLES
    string name = " ";	          	//CUSTOMER NAME
    string date = " ";	          	//DATE OF REPORT
    double principle = 0.0; 	//LOAN PRINCIPLE
    int term = 0;               	//TERM OF LOAN IN MONTHS
    double rate = 0.0;      	    	//ANNUAL INTEREST IN PERCENT FORM
    double payment = 0.0; 	//MONTHLY PAYMENT
    double decRate = 0.0;   	//MONTHLY INTEREST IN DECIMAL FORM

    //DISPLAY PROGRAM DESCRIPTION MESSAGE
    cout << "\nThis program will calculate a monthly loan interest"
           << "\npayment, total loan interest, or total loan amount." << endl;

    //setData ()FUNCTION: SET VARIABLES TO DATA ENTERED BY USER
    cout << "\nPlease enter your name: ";
    cin >> ws;
    getline(cin,name);
    cout << "\nEnter the date in XX/XX/XX format: ";
    cin >> ws;
    getline(cin,date);
    cout << "\nEnter the amount of the loan: $";
    cin >> principle;
    cout << "\nEnter the duration of the loan in months: ";
    cin >> term;
    cout << "\nEnter the annual interest rate in percent: ";
    cin >> rate;

    //calculatePayment() FUNCTION
    decRate = rate/12/100;
    payment = principle * decRate/(1-pow((1+decRate),-term));

    //displayResults() FUNCTION
    cout.setf(ios::fixed);
    cout.setf(ios::showpoint);
    cout.precision(2);
    cout << endl << endl;
    cout << "Name: " << name << endl;
    cout << "Date: " << date << endl;
    cout << "\n\n"
           << "LOAN AMOUNT"
           << "\tINTEREST RATE"
           << "\t\tTERM"
           << "\t\tPAYMENT" << endl;
    cout << "-----------"
           << "\t-------------"
           << "\t\t----"
           << "\t\t-------" << endl;
    cout << "$" << principle
           << "\t" << rate << "%"
           << "\t\t\t" << term << " Months"
           << "\t$" << payment << endl;

    //RETURN
   return 0;
} //END main()