复利计算器

import java.util.Scanner;public class Fulijisuan {public static void main(String[] args) {// TODO Auto-generated method stubdouble F=0;double singlesum=0;double doublesum=0;double m=0;Scanner scanner =new Scanner(System.in);System.out.println("1:复利计算\n2:单利计算\n3:复利计算求本金\n4:复利计算求年限\n5:复利计算求年率");System.out.println("6:复利计算每年定投");System.out.print("请输入您要求的:");int  n = scanner.nextInt();    switch (n){case 1:System.out.print("请输入你本金:");double p = scanner.nextDouble();System.out.print("请输入您的利率:");double i = scanner.nextDouble();System.out.print("请输入您的年限:");double year = scanner.nextDouble();for(int j=1;j<=year;j++){F=p*i;p=p+F;}doublesum=p;System.out.print("复利后的终值为"+doublesum+"");break;case 2:System.out.print("请输入你本金:");double p2 = scanner.nextDouble();System.out.print("请输入您的利率:");double i2 = scanner.nextDouble();System.out.print("请输入您的年限:");double year2 = scanner.nextDouble();for(int j=1;j<=year2;j++){F=p2*i2;m=m+F;}singlesum=p2+m;System.out.print("单利后的终值为"+singlesum+"");break;case 3:System.out.print("请输入你总额:");double sum = scanner.nextDouble();System.out.print("请输入你利率:");double i3 = scanner.nextDouble();System.out.print("请输入你期限:");double year3 = scanner.nextDouble();i3=1+i3;for(int j=1;j<=year3;j++){sum=sum/i3;}p=sum;System.out.print("应存本金为"+p+"");break;case 4:int year4=0;System.out.print("请输入你本金:");double p4 = scanner.nextDouble();System.out.print("请输入你利率:");double i4 = scanner.nextDouble();System.out.print("请输入你总额:");double sum4 = scanner.nextDouble();while(p4<sum4){for(int j=1;j<100;j++);{p4=p4*(1+i4);year4++;}}System.out.print("到"+sum4+"的时间要"+year4+"年");break;case 5:double i5;System.out.print("请输入你本金:");double p5 = scanner.nextDouble();System.out.print("请输入你总额:");double sum5 = scanner.nextDouble();System.out.print("请输入你期限:");double year5 = scanner.nextDouble();i5=Math.pow(sum5/p5, 1/year5)-1;System.out.print("在"+year5+"年内从"+p5+"到"+sum5+"的利率为:"+(float)i5+"");break;case 6:System.out.print("请输入你本金:");double p6 = scanner.nextDouble();System.out.print("请输入你利率:");double i6 = scanner.nextDouble();System.out.print("请输入你期限:");double year6 = scanner.nextDouble();double F6=p6;for(int j=1;j<=year6;j++){p6=p6*(1+i6);if(year6!=j)p6=p6+F6;}System.out.print("每年定投的产生的总额:"+p6+"");}}
}