单利计算与复利计算程序

import java.util.Scanner;

public class exercise {

public static void main(String[] args) {
int select;
do{
System.out.println("请问您想要进行单利计算还是复利计算：1.单利 2.复利");
Scanner keyin0=new Scanner(System.in);
select=keyin0.nextInt();
}while(select!=1&&select!=2);
System.out.println("请输入您想要存储的金额数量：");
Scanner keyin1=new Scanner(System.in);
double originalMoney=keyin1.nextDouble();
System.out.println("请输入您想要存储金额的时间(年):");
Scanner keyin2=new Scanner(System.in);
int year=keyin2.nextInt();
System.out.println("请输入您想要设计的年利率：");
Scanner keyin3=new Scanner(System.in);
double rate=keyin3.nextDouble();
double sumValue=originalMoney;
if(select==1)
{
double singleValue=originalMoney*(1+rate*year);
System.out.println("存入第"+year+"年后的存款总额为："+singleValue);
do{
System.out.println("请问您想要计算本金问题吗：1.需要 2.不需要");
select=new Scanner(System.in).nextInt();
}while(select!=1&&select!=2);
if(select==1){
System.out.println("请输入您想要筹到的金额：");
singleValue=new Scanner(System.in).nextDouble();
System.out.println("请输入您想要存储金额的时间(年):");
year=new Scanner(System.in).nextInt();
System.out.println("请输入您想要设计的年利率：");
rate=new Scanner(System.in).nextDouble();
originalMoney=singleValue/(1+rate*year);
System.out.println("需要本金"+originalMoney+"元");
}
}
else
{
for(int i = 1 ; i<=year; i++){
sumValue= (1+ rate)*sumValue;

}
System.out.println("存入第"+year+"年后的存款总额为："+sumValue);
do{
System.out.println("请问您想要计算本金问题吗：1.需要 2.不需要");
select=new Scanner(System.in).nextInt();
}while(select!=1&&select!=2);
if(select==1){
System.out.println("请输入您想要筹到的金额：");
sumValue=new Scanner(System.in).nextDouble();
System.out.println("请输入您想要存储金额的时间(年):");
year=new Scanner(System.in).nextInt();
System.out.println("请输入您想要设计的年利率：");
rate=new Scanner(System.in).nextDouble();
for(int i = 1 ; i<=year; i++){
sumValue= sumValue/(1+ rate);

}
originalMoney=sumValue;
System.out.println("需要本金"+originalMoney+"元");
}
do{
System.out.println("请问您想要计算时间问题吗：1.需要 2.不需要");
select=new Scanner(System.in).nextInt();
}while(select!=1&&select!=2);
if(select==1){
System.out.println("请输入您想要存储的金额数量：");
originalMoney=new Scanner(System.in).nextDouble();
System.out.println("请输入到期后您想要获取的金额：");
sumValue=new Scanner(System.in).nextInt();
System.out.println("请输入您想要设计的年利率：");
rate=new Scanner(System.in).nextDouble();
year=1;
for(; sumValue>originalMoney;year++){
originalMoney= originalMoney*(1+ rate);

}
year--;
System.out.println("需要"+year+"年时间");
}

}

}

}