import java.util.Scanner;
public class FuLi {
public static void main(String[] args) {
double N=;
Scanner scanner=new Scanner(System.in);
System.out.println("请选择复利计算(1)单利计算(2)复利计算(3)养老金计算方法(4)股票计算(5)帮你找投资(6)多次投资(7)贷款");
int choose=scanner.nextInt();
if(choose==){
System.out.println("(1)单利计算");
System.out.println("------------------------------");
System.out.println("请输入本金：");
float P=scanner.nextInt();
System.out.println("请输入利率：");
float i=scanner.nextFloat();
System.out.println("存入时间：");
float n=scanner.nextFloat();
fuLi(N, P, i, n);
}
if(choose==){
System.out.println("(2)复利计算");
System.out.println("------------------------------");
System.out.println("请输入本金：");
float P=scanner.nextInt();
System.out.println("请输入利率：");
float i=scanner.nextFloat();
System.out.println("存入时间：");
float n=scanner.nextFloat();
danLi(P, i,n);
}
if(choose==){
System.out.println("(3)养老金计算方法");
System.out.println("------------------------------");
System.out.println("请输入获得金钱：");
double total=scanner.nextDouble();
System.out.println("请输入利率：");
double i=scanner.nextDouble();
System.out.println("存入时间：");
double n=scanner.nextDouble();
yangLaoJin(i,total,n);
}
if(choose==){
System.out.println("(4)股票计算");
System.out.println("------------------------------");
System.out.println("请输入你所存入的本金：");
double P=scanner.nextDouble();
System.out.println("------------------------------");
System.out.println("请输入你所存的报酬率：");
double i=scanner.nextDouble();
System.out.println("------------------------------");
System.out.println(" 到最后期望的金额：");
double total=scanner.nextDouble();
maiGuPiao(P,i,total);
}
if(choose==)
{
System.out.println("(5)帮你找投资");
System.out.println("------------------------------");
System.out.println("请输入你所存入的本金：");
double P=scanner.nextDouble();
System.out.println("------------------------------");
System.out.println(" 请输入你所存的存款时长：");
double n=scanner.nextDouble();
System.out.println("------------------------------");
System.out.println(" 到最后期望的金额：");
double total=scanner.nextDouble();
bangZhaoTouZhi(P,n,total);
}
if(choose==)
{
System.out.println("(6)多次投资");
System.out.println("------------------------------");
System.out.println("请输入你所存入的本金：");
double P=scanner.nextDouble();
System.out.println("------------------------------");
System.out.println("请输入你所存的报酬率：");
double i=scanner.nextDouble();
System.out.println("------------------------------");
System.out.println("请输入你所存的存款时长：");
double n=scanner.nextDouble();
duoCiTouZhi(P,i,n);
}
if(choose==)
{
System.out.println("(7)贷款");
System.out.println("------------------------------");
System.out.print("请输入你所贷款金额：");
double total=scanner.nextDouble();
System.out.println("------------------------------");
System.out.println("请输入你所贷款的年利率：");
double i=scanner.nextDouble();
System.out.println("------------------------------");
System.out.println("请输入你贷款的还款时长（月）：");
double m=scanner.nextDouble();
daiKuan(total,i,m);
}
}
private static void daiKuan(double total,double i,double m) {
double n = m*;
double money = total*i*Math.pow((1.0+i),n)/(Math.pow(1.0+i,n)-);
System.out.println("------------------------------");
System.out.println("你每月等额本息还款是："+money);
}
private static void duoCiTouZhi(double P,double i,double n) {
double total=P*Math.pow(+i,n);
System.out.println("------------------------------");
System.out.println("你所获得的总金额是:"+total);
}
private static void maiGuPiao(double P,double i,double total) {
i=i*;
double n=(/i);
System.out.println("------------------------------");
System.out.println("通过复利的股票型存款，得到期望金额大概所需要的年份："+n);
}
private static void bangZhaoTouZhi(double P,double n,double total) {
double base= (double) (((total-P)/P)/n);
System.out.println("------------------------------");
System.out.println("通过复利的股票型存款本金翻倍的报酬率为："+base);
}
private static void yangLaoJin(double i, double total,double n) {//n 时间 i 利率
for(int j=;j<=n;j++){
i=(+n)*i;
}
double money=total/i;
System.out.println("------------------------------");
System.out.println("需要本金："+money);
}
private static void danLi(double P, double i,double n) {
double G;
G=P+P*i*n;
System.out.println("------------------------------");
System.out.println("单利终值为："+G);
}
private static void fuLi(double N, double P, double i, double n) {
for(int j=;j<=n;j++){
N=(+i)*N;
}
double F;
F=P*N;
System.out.println("------------------------------");
System.out.println("复利终值为："+F);
}
}
