// Write a procedural C++ program that calculates and displays the mortgage payment
//amount given the amount of the mortgage, the term of the mortgage, and the interest rate of the mortgage.
//In this program, hard code
//the amount = $200,000
//the term = 30 years
//the interest rate = 5.75%.  
//Insert comments in the program to document the program.

#include "stdafx.h"
#include "math.h"
#include <iostream>
#using <mscorlib.dll>
using namespace System;

int main()
{
    int a = 200000; //amount of the loan
    double i = .00575; // the losn interest rate
    int y = 30; //years of the loan
    int t = y*12; //loan term in months
    int mPayment; //variable for ouputting the payment
    
    mPayment = (a * i) / (1 - pow(1+i,-t)); //Formula to figure mortgage payment amount
          
    printf( "Your Monthly Payment Amount is: $ %i\n", mPayment);  //prints out montyly payment amount
    
    return 0;
}

#include "math.h"
#include <iostream>
using namespace std;

int main()
{
  int a = 200000; //amount of the loan
  double i = .00575; // the losn interest rate
  int y = 30; //years of the loan
  int t = y*12; //loan term in months
  double mPayment; //variable for ouputting the payment

  mPayment = (a * i) / (1 - pow(1+i,-t)); //Formula to figure mortgage payment amount

  cout<< "Your Monthly Payment Amount is: $"<< mPayment; //prints out montyly payment amount
  return 0;
}

using namespace std;

// mortgage program

//header file
#include "stdafx.h"
#include "math.h"
#include <stdio.h>
#include <iostream>
#include <iomanip> //added for setprecision
#include <algorithm>

using namespace std;

bool validNumber(char *chrA) {

int n=0;
int start=0;

if(*chrA == '-') { start = 1; }

   for(n=start; *(chrA + n) != 0; n++) {
       if ( *(chrA + n)  > '9' || *(chrA + n) < '0' &&  *(chrA + n)  != '.') {
               return false;
       }
   }
   return true;
}

int main()//begining of main function
{
    char Exit = 'y';    //char used in while loop to continue or exit
    char P_char[ 10 ];    //char array for Principal
    char T_char[ 3 ];    //char array for Term
    char I_char[ 5 ];    //char array for Interest
    double P = 0;        //Amount of the loan
    double I = 0;        //The loan interest rate
    double T =0;        //The length of the mortgage in years
    int C = 1;            //declare variable type for c used as counter later
      int M = 12;            //Twelve Months in a year
    double IM = (I/100)/M;//The interest rate per month
    double TM = T * M;//total number of payments over the life of the loan (Term*Months)
    double MonthlyPayment;    //Variable for Monthly Payment
    
cout << fixed; //sets fixed decimal point

    do{         
    cout <<"\n\t\t*******************************"; //output to screen
    cout <<"\n\t\t**    Mortgage Calculator    **"; //output to screen like a header
    cout <<"\n\t\t*******************************"; //output to screen
    cout << endl;
    cout <<"\n\t     Enter the Loan Information when Prompted"; //output to screen instructions
    cout <<"\n\t\t*******************************"; //output to screen
    cout << endl;
        
   //char P_char[ 10 ];
        cout << "\n\t\tPlease enter the loan Principal: $";
        cin >> P_char;

   if (validNumber(&P_char[ 0 ])) {
       P = double.Parse(P_char);
        cout << endl;
   }
   else {
        cout << "\n\t\tyou did NOT enter a valid number! \n\t\tPlease enter nubers only: $";
        cin.clear();//reset cin, so more input can be done
        cin.ignore(50,'\n');//remove bad data, up to 50 characters or until the end of line is reached    
        cin >> P_char;
         }

   //char I_char[ 10 ];
        cout << "\n\t\tPlease enter the loan Interest Rate: ";
        cin >> I_char;

   if (validNumber(&I_char[ 0 ])) {
       I = double.Parse(I_char);
        cout << endl;
   }
   else {
        cout << "\n\t\tyou did NOT enter a valid number! \n\t\tPlease enter numbers and decimal only: ";
        cin.clear();//reset cin, so more input can be done
        cin.ignore(50,'\n');//remove bad data, up to 50 characters or until the end of line is reached            
        cin >> I_char;
   }

   //char T_char[ 10 ];
        cout << "\n\t\tPlease enter the loan Term in years: ";
        cin >> T_char;

   if (validNumber(&T_char[ 0 ])) {
        T = double.Parse(T_char);
        cout << endl;  
    }
   else {
        cout << "\n\t\tyou did NOT enter a valid number! \n\t\tPlease enter numbers only: ";
        cin.clear();//reset cin, so more input can be done
        cin.ignore(50,'\n');//remove bad data, up to 50 characters or until the end of line is reached        
        cin >> T_char;
   }
    
    IM = (I/100)/12; //Calculates Interest Monthly
    TM = T * M; //Calculates Term Months
    MonthlyPayment = P * (IM/(1 - pow((1+IM), -TM))); //Calculates monthly loan payment
    while (C >= 0){
    cout <<"\n\t\t ******************************"; //prints to screen
    cout <<"\n\n\t\tYour Monthly Loan Payment is: $" << setprecision(2) << MonthlyPayment << endl; //prints out montyly payment amount
    cout <<"\n\t\t ******************************"; //prints to screen
    cout << "\n\t\t";//adds another line and move the press key statement
    C--;
    }

    cout <<"\n\t\t\" y \" to continue any other to quit: "; //output to screen
    cin >> Exit; //Input from User    
    system ("cls"); //clears the screen
    } while(Exit == 'y'); //end of do loop

return 0;

} //end of main

char mystring[10] = "13.337";

float myfloat = atof(mystring);

float myfloat = 0.0;

cin >> myfloat;
if (cin.good())
{
    //Input was indeed a floating point value, continue
}
else
{
    cout << "ERROR: Input was not a floating point value.\n"l
}