0317复利计算3.0

package kxj;
import java.util.Scanner;

public class Fulijisuan {
     public static double p,i,f ;
     public static double n;
     
     //计算本金
    public static void Benjin(){
        //int n;
        //float f,i,p;
         Scanner scanner=new Scanner(System.in);
          System.out.println("请输入终值: ");
          f=scanner.nextDouble();
          System.out.println("请输入年利率: ");
          i=scanner.nextDouble();
          System.out.println("请输入年数: ");
          n=scanner.nextInt();
          p=(float) (f*1/Math.pow(1+i, n));
          System.out.println("本金为： "+(double)(Math.round(p*100)/100.0));
    
    }
    
    //计算本息和
    public static void Benxihe(){
         double sum1,sum2;
          Scanner scanner=new Scanner(System.in);
          System.out.println("请输入本金: ");
          p=scanner.nextDouble();
          System.out.println("请输入年利率: ");
          i=scanner.nextDouble();
          System.out.println("请输入年数: ");
          n=scanner.nextInt();
          sum1=(float) (p*Math.pow(1+i, n));
          sum2=p*(1+i*n);
          System.out.println("复利的本息和为： "+(double)(Math.round(sum1*100)/100.0));
          System.out.println("单利的本息和为： "+(double)(Math.round(sum2*100)/100.0));
    }
    
    //计算年数
    public static void Nianshu(){
          Scanner scanner=new Scanner(System.in);
          System.out.println("请输入本金: ");
          p=scanner.nextDouble();
          System.out.println("请输入终值: ");
          f=scanner.nextDouble();
          System.out.println("请输入年利率: ");
          i=scanner.nextDouble();
          n=Logarithm.log(f/p,1+i);
          n=Math.ceil(n);
          System.out.println("需要存的年数为: "+Math.ceil(n));     
    }
    
    //计算年利率
    public static void Lilv(){
         Scanner scanner=new Scanner(System.in);
          System.out.println("请输入本金: ");
          p=scanner.nextDouble();
          System.out.println("请输入终值: ");
          f=scanner.nextDouble();
          System.out.println("请输入年数: ");
          n=scanner.nextInt();
          i=Math.pow(f/p, 1.0/n)-1;
          System.out.println("年报酬率为： "+(double)(Math.round(i*1000)/1000.0));
    }
    
    //计算本利之和连同年金投资后的总资产
    public static void Nianjin(){
         int k=1;
         f=0;
         Scanner scanner=new Scanner(System.in);
          System.out.println("请输入本金: ");
          p=scanner.nextDouble();
          System.out.println("请输入年利率: ");
          i=scanner.nextDouble();
          System.out.println("请输入年数: ");
          n=scanner.nextInt();
          while(k<=n){
              p=p+f;
              f=p*(1+i);
              k++;
          }
         System.out.println("年资产总值为："+(int)f);
    }
    
 
     public static void main(String[] args) {
         int choice;
         while(true){
         System.out.println("		|*******************|");
         System.out.println("		|  1.求本金                         |");
         System.out.println("		|  2.求本息和                    |");
         System.out.println("		|  3.求年数                         |");
        System.out.println("		|  4.求利率                         |");
        System.out.println("		|  5.求年资产总值          |");
         System.out.println("		|  6.退出              |");
         System.out.println("		|*************|");
         Scanner scanner=new Scanner(System.in);
         System.out.println("请输入你的选择(1~6):  ");
         choice=scanner.nextInt();
         switch(choice){
         case 1:
             Benjin();
             break;
         case 2:
             Benxihe();
             break;
         case 3:
             Nianshu();
             break;
         case 4:
             Lilv();
             break;
         case 5:
             Nianjin();
             break;
         case 6:
             System.exit(0);
             break;
             default:
             {
                 System.out.println("输入有误!");
                 break;
             }
         }
             }        
         }
     }

package kxj;

public class Logarithm {
     static public double log(double value, double base){
            return Math.log(value)/Math.log(base);
             
         }
}

 功能说明：

新增了计算期限、年利率，以及每年都将本利和连同年金投入获得的年资产总值的功能。