0316-复利计算更新

import java.util.Scanner;

public class Fulijisuan {
    public static void main(String[] args) {
                  // TODO Auto-generated method stub
        System.out.println("欢迎使用复利计算器！");
        /*复利计算公式：F=P*(1+r)^N
         * F:复利终值
         * P:本金
         * r:利率
         * N:利率获取时间的整数倍
         */
        Scanner scanner=new Scanner(System.in);
        System.out.print("复利计算器：计算单利和复利请按1,计算本金请按2,股票请按3，报酬率请按4:");
        int num=scanner.nextInt();
        if(num==1){
            double H=1,F;
            System.out.print("请输入本金：");     
            double P = scanner.nextDouble();  
            System.out.print("请输入存入年数：");
            int N = scanner.nextInt();           
            System.out.print("请输入利率：");
            double r = scanner.nextDouble();
            F=P+P*N*r;
            System.out.println("单利终值为："+F);
            F=0;
             for(int i=1;i<=N;i++){
                   H=(1+r)*H;
               }
                 F=H*P;
                 System.out.println("复利终值为："+F);

        }
        if(num==2){
             double H=1,P;
              System.out.print("请输入复利终值：");     
              double F = scanner.nextDouble();  
              System.out.print("请输入存入年数：");
              int N = scanner.nextInt();           
             System.out.print("请输入利率：");
              double r = scanner.nextDouble();
              for(int i=1;i<=N;i++){
                   H=(1+r)*H;
               }
                 P=F/H;
                 System.out.println("本金应为："+P);
        }
        if(num==3){
            double N = 1;
            System.out.print("请输入本金：");     
            double P= scanner.nextDouble();  
            System.out.print("请输入终值：");
            int F= scanner.nextInt();           
            System.out.print("请输入报酬率：");
            double r = scanner.nextDouble();
            for(int i=1;i<=F;i++){
                N=Math.log(F/P)/Math.log(1+r);
            }
            System.out.println("存入时间为："+N);
        }
        if(num==4){
            double r= 1;
            System.out.print("请输入本金：");     
            double P= scanner.nextDouble();  
            System.out.print("请输入终值：");
            int F= scanner.nextInt();           
            System.out.print("请输入存入年数：");
            double N = scanner.nextDouble();
            for(int i=1;i<=F;i++){
                r=Math.pow(F/P,1d/N);
            }
            System.out.println("报酬率应为："+r);
        }
                            
     
         }
    }

import java.util.Scanner;
public class Fulijisuan {public static void main(String[] args) {          // TODO Auto-generated method stubSystem.out.println("欢迎使用复利计算器！");/*复利计算公式：F=P*(1+r)^N * F:复利终值 * P:本金 * r:利率 * N:利率获取时间的整数倍 */Scanner scanner=new Scanner(System.in);System.out.print("复利计算器：计算单利和复利请按1,计算本金请按2,股票请按3，报酬率请按4:");int num=scanner.nextInt();if(num==1){double H=1,F;        System.out.print("请输入本金：");             double P = scanner.nextDouble();          System.out.print("请输入存入年数：");        int N = scanner.nextInt();                   System.out.print("请输入利率：");        double r = scanner.nextDouble();        F=P+P*N*r;        System.out.println("单利终值为："+F);        F=0;         for(int i=1;i<=N;i++){               H=(1+r)*H;           }             F=H*P;             System.out.println("复利终值为："+F);
}if(num==2){ double H=1,P;          System.out.print("请输入复利终值：");               double F = scanner.nextDouble();            System.out.print("请输入存入年数：");          int N = scanner.nextInt();                    System.out.print("请输入利率：");          double r = scanner.nextDouble();          for(int i=1;i<=N;i++){               H=(1+r)*H;           }             P=F/H;             System.out.println("本金应为："+P);}if(num==3){double N = 1;System.out.print("请输入本金：");             double P= scanner.nextDouble();          System.out.print("请输入终值：");        int F= scanner.nextInt();                   System.out.print("请输入报酬率：");        double r = scanner.nextDouble();        for(int i=1;i<=F;i++){        N=Math.log(F/P)/Math.log(1+r);        }        System.out.println("存入时间为："+N);}if(num==4){double r= 1;System.out.print("请输入本金：");             double P= scanner.nextDouble();          System.out.print("请输入终值：");        int F= scanner.nextInt();                   System.out.print("请输入存入年数：");        double N = scanner.nextDouble();        for(int i=1;i<=F;i++){        r=Math.pow(F/P,1d/N);        }        System.out.println("报酬率应为："+r);}                      }}