debt.h

用于计算住房按揭贷款 输入：贷款金额、按揭期（月）数及银行利率（五年内和五年外） 输出：等额本息月供、贷款利息总额、剩余本金及支付利息金额

#ifndef _H_DEBT
#define _H_DEBT

#include <iostream>
#include <cmath>
using namespace std;

class Debt
{
private:
	double R; // Bank debt rate
	double R5; // rate under 5 years
	double R30; // rate beyond 5 years
public:
	double T; // Total debt
	double P; // pay for month
	double N; // mount of periodics
	double Table[30]; // pay table, the basis is 10,000 Yuan
	double Increment; // the Increment of the debt
	double Remain;
public:
	void GetR(double _R5, double _R30);  // Get R
	double GetT(double _t);  // Get T
	double GetP(double _p);  // Get P
	double GetN(double _n);  // Get N
	double CalP();           // When get N, calculate P
	double CalN();           // when get P, calculate N
	void CalPayTable();    // calculate P with N changing from 1 year to 30 years
	double CalIncrement();   // calculate incremental debt for rate R and periodics N
	void ShowInfo();
	double RemainAft(int nMonth);
};



#endif