复利进度

import java.text.NumberFormat;
import java.util.Scanner;

public class fuli {

public static void main(String[] args) {
// TODO 自动生成的方法存根
System.out.print("请选择求单利1,复利2,本金3,时间4,利率5,投资6");
Scanner scanner=new Scanner(System.in);
int a=scanner.nextInt();
switch(a)
{
case 1:danli();
break;
case 2: fulili();
break;
case 3:benjin();
break;
case 4:shijian();
break;
case 5:lilv();
break;
case 6:touzi();
break;
default:System.out.print("请重新输入");
main(null);


}

}

static void benjin() {
// TODO Auto-generated method stub
Scanner scanner=new Scanner(System.in);
System.out.print("请输入预期钱数");
double A=scanner.nextDouble();
System.out.print("请输入年利率");
double B=scanner.nextDouble();
System.out.print("请输入存入年限");
int C=scanner.nextInt();
double D=1;
for(int i=1;i<=C;i++)
{
D=D*(1+B);
}
System.out.println("本金"+String.format("%.4f", (A/D)));
main(null);
}

static void fulili()
{
Scanner scanner=new Scanner(System.in);
System.out.print("请输入本金");
double A=scanner.nextDouble();
System.out.print("请输入年利率");
double B=scanner.nextDouble();
System.out.print("请输入存入年限");
int C=scanner.nextInt();
double D=1;
for(int i=1;i<=C;i++)
{
D=D*(1+B);
}
System.out.println("复利终值"+String.format("%.4f", (A*D)));
main(null);
}
static void danli()
{
Scanner scanner=new Scanner(System.in);
System.out.print("请输入本金");
double A=scanner.nextDouble();
System.out.print("请输入年利率");
double B=scanner.nextDouble();
System.out.print("请输入存入年限");
int C=scanner.nextInt();
double D=1;
D=A*B*C;
System.out.println("单利终值"+(A+D));
main(null);
}
static void shijian()
{
Scanner scanner=new Scanner(System.in);
System.out.print("请输入本金");
double A=scanner.nextDouble();
System.out.print("请输入年利率");
double B=scanner.nextDouble();
System.out.print("请输入存入预期金额");
double C=scanner.nextDouble();
double D=1;
double E=1;
int i=1;

while(true)
{
D=D*(1+B);
E=A*D;
if(E<=C)
i++;
else break;
}

System.out.println("需"+i+"年");
main(null);
}
static void lilv()
{
Scanner scanner=new Scanner(System.in);
System.out.print("请输入本金");
double A=scanner.nextDouble();
System.out.print("请输入预期金额");
double B=scanner.nextDouble();
System.out.print("请输入存入年限");
double C=scanner.nextDouble();
double D=1;
D=Math.pow(B/A, 1/C)-1;
System.out.println("利率为"+String.format("%.4f",D));
main(null);
}
static void touzi() {
// TODO Auto-generated method stub
Scanner scanner=new Scanner(System.in);
System.out.print("请输入投资额");
double A=scanner.nextDouble();
System.out.print("请输入年利率");
double B=scanner.nextDouble();
System.out.print("请输入存入年限");
int C=scanner.nextInt();
double D=0;
for(int i=1;i<=C;i++)
{
D=D+A;
D=D*(1+B);
}
System.out.println("最终获利"+String.format("%.4f", D));
main(null);
}
}

 

复利计算一步步完善，虽然都是千篇一律，只是增加了功能，接下来要做的就是进行最关键的单元测试，希望能顺利完成。。。