1 import java.util.Scanner;
2
3 public class exercise {
4
5 public static void main(String[] args) {
6 int select;
7 do {
8 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");
9 Scanner keyin0 = new Scanner(System.in);
10 select = keyin0.nextInt();
11 } while (select != 1 && select != 2);
12 System.out.println("请输入您想要存储的金额数量：");
13 Scanner keyin1 = new Scanner(System.in);
14 double originalMoney = keyin1.nextDouble();
15 System.out.println("请输入您想要存储金额的时间(年):");
16 Scanner keyin2 = new Scanner(System.in);
17 int year = keyin2.nextInt();
18 System.out.println("请输入您想要设计的年利率：");
19 Scanner keyin3 = new Scanner(System.in);
20 double rate = keyin3.nextDouble();
21 double sumValue = originalMoney;
22 if (select == 1) {
23 double singleValue = originalMoney * (1 + rate * year);
24 System.out.println("存入第" + year + "年后的存款总额为：" + singleValue);
25 do {
26 System.out.println("请问您想要计算本金问题吗：1.需要 2.不需要");
27 select = new Scanner(System.in).nextInt();
28 } while (select != 1 && select != 2);
29 if (select == 1) {
30 System.out.println("请输入您想要筹到的金额：");
31 singleValue = new Scanner(System.in).nextDouble();
32 System.out.println("请输入您想要存储金额的时间(年):");
33 year = new Scanner(System.in).nextInt();
34 System.out.println("请输入您想要设计的年利率：");
35 rate = new Scanner(System.in).nextDouble();
36 originalMoney = singleValue / (1 + rate * year);
37 System.out.println("需要本金" + originalMoney + "元");
38 }
39 }
40 else {
41 for (int i = 1; i <= year; i++) {
42 sumValue = (1 + rate) * sumValue;
43
44 }
45 System.out.println("存入第" + year + "年后的存款总额为：" + sumValue);
46 do {
47 System.out.println("请问您想要计算本金问题吗：1.需要 2.不需要");
48 select = new Scanner(System.in).nextInt();
49 } while (select != 1 && select != 2);
50 if (select == 1) {
51 System.out.println("请输入您想要筹到的金额：");
52 sumValue = new Scanner(System.in).nextDouble();
53 System.out.println("请输入您想要存储金额的时间(年):");
54 year = new Scanner(System.in).nextInt();
55 System.out.println("请输入您想要设计的年利率：");
56 rate = new Scanner(System.in).nextDouble();
57 for (int i = 1; i <= year; i++) {
58 sumValue = sumValue / (1 + rate);
59
60 }
61 originalMoney = sumValue;
62 System.out.println("需要本金" + originalMoney + "元");
63 }
64 do {
65 System.out.println("请问您想要计算时间问题吗：1.需要 2.不需要");
66 select = new Scanner(System.in).nextInt();
67 } while (select != 1 && select != 2);
68 if (select == 1) {
69 System.out.println("请输入您想要存储的金额数量：");
70 originalMoney = new Scanner(System.in).nextDouble();
71 System.out.println("请输入到期后您想要获取的金额：");
72 sumValue = new Scanner(System.in).nextDouble();
73 System.out.println("请输入您想要设计的年利率：");
74 rate = new Scanner(System.in).nextDouble();
75 year = 1;
76 for (; sumValue > originalMoney; year++) {
77 originalMoney = originalMoney * (1 + rate);
78
79 }
80 year--;
81 System.out.println("需要" + year + "年时间");
82 }
83 do {
84 System.out.println("请问您想要计算利率问题吗：1.需要 2.不需要");
85 select = new Scanner(System.in).nextInt();
86 } while (select != 1 && select != 2);
87 //}while (select != 1 && select != 2);
88 if (select == 1) {
89 System.out.println("请输入您想要存储的金额数量：");
90 originalMoney = new Scanner(System.in).nextDouble();
91 System.out.println("请输入到期后您想要获取的金额：");
92 sumValue = new Scanner(System.in).nextDouble();
93 System.out.println("请输入您想要存储金额的时间(年):");
94 year = new Scanner(System.in).nextInt();
95 rate = 0;
96 for (; Math.log(sumValue / originalMoney) / Math.log(rate + 1) > year; rate = rate + 0.0001) {
97 continue;
98 }
99 System.out.println("年利率应为：" + rate);
100
101 }
102 do {
103 System.out.println("请问您想要计算每年或者每月拿出固定金额投资吗：1.需要 2.不需要");
104 select = new Scanner(System.in).nextInt();
105 } while (select != 1 && select != 2);
106 if(select==1){
107 do {
108 System.out.println("请问您想要投资额是以月计算还是以年计算：1.月 2.年");
109 select = new Scanner(System.in).nextInt();
110 } while (select != 1 && select != 2);
111 if(select==1){
112 System.out.println("请问您想每个月定期投资多少：");
113 originalMoney = new Scanner(System.in).nextDouble();
114 System.out.println("请输入您想要设计的月利率：");
115 double rateMonth = new Scanner(System.in).nextDouble();
116 System.out.println("请输入您想要存储金额的时间(月):");
117 int month = new Scanner(System.in).nextInt();
118 sumValue=0;
119 for (int i = 1; i <= month; i++) {
120 sumValue = (1 + rateMonth) * (sumValue+originalMoney);
121
122 }
123 System.out.println(""+month+"个月后资产总值将变为："+sumValue);
124 }
125 if(select==2){
126 System.out.println("请问您想每年定期投资多少：");
127 originalMoney = new Scanner(System.in).nextDouble();
128 System.out.println("请输入您想要设计的年利率：");
129 rate = new Scanner(System.in).nextDouble();
130 System.out.println("请输入您想要存储金额的时间(年):");
131 year = new Scanner(System.in).nextInt();
132 sumValue=0;
133 for (int i = 1; i <=year; i++) {
134 sumValue = (1 + rate) * (sumValue+originalMoney);
135
136 }
137 System.out.println(""+year+"年后资产总值将变为："+sumValue);
138 }
139 }
140 do {
141 System.out.println("请问您想要计算贷款问题吗：1.需要 2.不需要");
142 select = new Scanner(System.in).nextInt();
143 } while (select != 1 && select != 2);
144 if(select==1)
145 {
146 System.out.print("请输入贷款金额：");
147 originalMoney=new Scanner(System.in).nextDouble();
148 System.out.print("请输入贷款的时间期限(年)：");
149 year=new Scanner(System.in).nextInt();
150 System.out.print("请输入贷款的年利率：");
151 rate=new Scanner(System.in).nextDouble();
152 sumValue=originalMoney;
153 for (int i = 1; i <= year; i++) {
154 sumValue = (1 + rate) * sumValue;
155
156 }
157
158 double returnPay=sumValue/(year*12);
159 System.out.println("每个月应该偿还"+returnPay);
160
161 }
162
163 }
164
165 }
166 }
