public static List <BackUnit> Compute(double amount, double yearRate, int months)
{
/// <summary>
/// 一次性还本付息
/// </summary>
/// <param name="amount">投资金额</param>
/// <param name="yearRate">年利率</param>
/// <param name="months">投资期限，单位：月</param>
/// <returns></returns>
BackUnit unit = new BackUnit();
var datalist = new List <BackUnit>();
var rate = yearRate;
var rateIncome = amount * rate / 100 * (months / 12.0);
var totalIncome = amount + rateIncome;
unit.Number = 1; // 期数
unit.TotalRate = rateIncome; //Math.Round((Amount + TotalRate) * 100) / 100;// 总利息
unit.TotalMoney = totalIncome; //TotalRate;// 总还款
unit.A = totalIncome; // 偿还本息 someNumber.ToString("N2");
unit.B = rateIncome; // 偿还利息
unit.C = 0; // 偿还本金
unit.D = 0; // 剩余本金
datalist.Add(unit);
return(datalist);
}
public static List <BackUnit> Compute(double amount, double yearRate, int months)
{
/// <summary>
/// 等额本息法
/// </summary>
/// <param name="amountT">投资金额</param>
/// <param name="yearRate">年利率</param>
/// <param name="monthsx">投资期限，单位：月</param>
/// <returns></returns>
var monthRate = (yearRate) / 1200.0; //年利率转为月利率
var datalist = new List <BackUnit>();
var i = 0;
var a = 0.0; // 偿还本息
var b = 0.0; // 偿还利息
var c = 0.0; // 偿还本金
//利息收益
var totalRateIncome =
(amount * months * monthRate * Math.Pow((1 + monthRate), months)) / (Math.Pow((1 + monthRate), months) - 1) - amount;
var totalIncome = totalRateIncome + amount;
var d = amount + totalRateIncome; // 剩余本金
totalRateIncome = Math.Round(totalRateIncome * 100) / 100; // 支付总利息
totalIncome = Math.Round(totalIncome * 100) / 100;
a = totalIncome / months; //每月还款本息
a = Math.Round(a * 100) / 100; //每月还款本息
for (i = 1; i <= months; i++)
{
b = (amount * monthRate * (Math.Pow((1 + monthRate), months) - Math.Pow((1 + monthRate), (i - 1)))) / (Math.Pow((1 + monthRate), months) - 1);
b = Math.Round(b * 100) / 100;
c = a - b;
c = Math.Round(c * 100) / 100;
d = d - a;
d = Math.Round(d * 100) / 100;
if (i == months)
{
c = c + d;
b = b - d;
c = Math.Round(c * 100) / 100;
b = Math.Round(b * 100) / 100;
d = 0;
}
var unit = new BackUnit();
unit.Number = i; // 期数
unit.TotalRate = totalRateIncome; // 总利息
unit.TotalMoney = totalIncome; // 总还款
unit.A = a; // 偿还本息 someNumber.ToString("N2");
unit.B = b; // 偿还利息
unit.C = c; // 偿还本金
unit.D = d; // 剩余本金
datalist.Add(unit);
}
return(datalist);
}
public static List <BackUnit> Compute(double amount, double yearRate, int months)
{
/// <summary>
/// 按月付息到期还本
/// </summary>
/// <param name="amount">投资金额</param>
/// <param name="yearRate">年利率</param>
/// <param name="months">投资期限，单位：月</param>
/// <returns></returns>
var datalist = new List <BackUnit>(); //new Array(Deadline); //
double rateIncome = amount * yearRate / 100 * (months / 12.0);
double rateIncomeEve = (rateIncome / months);
var total = amount + rateIncome;
for (var i = 1; i < months; i++)
{
var unit = new BackUnit();
unit.Number = i; // 期数
unit.TotalRate = rateIncome; //Math.Round((Amount + TotalRate) * 100) / 100;// 总利息
unit.TotalMoney = total; //TotalRate;// 总还款
unit.A = Math.Round(rateIncomeEve * 100) / 100; // rateIncomeEve; 偿还本息 someNumber.ToString("N2");
unit.B = Math.Round(rateIncomeEve * 100) / 100; // 偿还利息
unit.C = 0; // 偿还本金
unit.D = Math.Round((amount * 1 + rateIncome * 1 - rateIncomeEve * i) * 100) / 100; // 剩余本金
datalist.Add(unit);
}
datalist.Add(new BackUnit()
{
Number = months,
TotalRate = rateIncome,
TotalMoney = total,
A = amount + rateIncomeEve,
B = Math.Round(rateIncomeEve * 100) / 100,
C = amount,
D = 0
});
return(datalist);
}
