你若懂行，那便有用，如下：
void Main()
{ var x = DengEBenXi.Compute(11111, 12, 3); x.Dump(); var y = AnYueFuxiDaoqiHuanBen.Compute(11111, 12, 3); y.Dump(); var z = YicixingHuanBenFuxi.Compute(11111, 12, 3); z.Dump();} public class DengEBenXi { /// <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> public static List<BackUnit> Compute(double amount, double yearRate, int months) {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 class AnYueFuxiDaoqiHuanBen
{ /// <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> public static List<BackUnit> Compute(double amount, double yearRate, int months) { 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 = rateIncomeEve;// 偿还本息 someNumber.ToString("N2"); unit.B = rateIncomeEve;// 偿还利息 unit.C = 0;// 偿还本金 unit.D = amount * 1 + rateIncome * 1 - rateIncomeEve * i;// 剩余本金 datalist.Add(unit); }datalist.Add(new BackUnit() {
Number= months, TotalRate = rateIncome, TotalMoney = total, A = amount + rateIncomeEve, B = rateIncomeEve, C = amount, D = 0 }); return datalist; } }public class YicixingHuanBenFuxi
{ /// <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> public static BackUnit Compute(double amount, double yearRate, int months) { BackUnit unit = new 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 return unit; } }public class BackUnit
{ //当前期数 public int Number { get; set; } //总利息 public double TotalRate { get; set; } //总还款 public double TotalMoney { get; set; } //本期应还全部 public double A { get; set; } //本期应还利息 public double B { get; set; } //本期应还本金 public double C { get; set; } //本期剩余本金 public double D { get; set; } }以下为运行结果：
再附送一个我所写的在线测试地址：。