0330复利计算4.0（改）
Posted 12许佳仪
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1 import java.util.Scanner; 2 3 public class text { 4 5 public static void main(String[] args) { 6 while (true) { 7 Scanner scanner = new Scanner(System.in); 8 System.out.println("----------------------------"); 9 System.out.println(" 1.复利计算本息 "); 10 System.out.println(" 2.单利计算本息 "); 11 System.out.println(" 3.复利计算本金 "); 12 System.out.println(" 4.单利计算本金 "); 13 System.out.println(" 5.算投资年限 "); 14 System.out.println(" 6.算投资年利率 "); 15 System.out.println(" 7.每年定投收益 "); 16 System.out.println(" 8.每月定投收益 "); 17 System.out.println(" 9.每月等额本息还款 "); 18 System.out.println(" 0.退出 "); 19 System.out.println("----------------------------"); 20 System.out.print("请选择："); 21 int number = scanner.nextInt(); 22 switch (number) { 23 case 1: 24 BenxiFuli(); 25 break; 26 case 2: 27 BenxiDanli(); 28 break; 29 case 3: 30 BenjinFuli(); 31 break; 32 case 4: 33 BenjinDanli(); 34 break; 35 case 5: 36 TouziYear(); 37 break; 38 case 6: 39 TouziRate(); 40 break; 41 case 7: 42 YearDingtoushouyi(); 43 break; 44 case 8: 45 MonthDingtoushouyi(); 46 break; 47 case 9: 48 Dengerbenxihuanknan(); 49 break; 50 case 0: 51 Exit(); 52 break; 53 default: { 54 System.out.println("输入错误!请重新输入!"); 55 break; 56 } 57 } 58 } 59 60 } 61 62 private static void Exit() { 63 // TODO 自动生成的方法存根 64 System.out.println("谢谢使用！"); 65 System.exit(0); 66 67 } 68 69 private static void Dengerbenxihuanknan() { 70 // TODO 自动生成的方法存根 71 Scanner scanner = new Scanner(System.in); 72 System.out.print("请输入贷款本金："); 73 double money = scanner.nextDouble(); 74 System.out.print("请输入年利率："); 75 double rate = scanner.nextDouble(); 76 System.out.print("请输入年限："); 77 int year = scanner.nextInt(); 78 double num = 1; 79 for (int i = 1; i <= year * 12; i++) { 80 num = (1 + (rate / 12)) * num; 81 82 } 83 money = money * ((rate / 12) * num) / (num - 1); 84 System.out.println("每月等额本息还款：" 85 + (double) (Math.round(money * 100) / 100.0)); 86 87 } 88 89 private static void MonthDingtoushouyi() { 90 // TODO 自动生成的方法存根 91 Scanner scanner = new Scanner(System.in); 92 93 System.out.print("请输入每月的定投金额："); 94 double money = scanner.nextDouble(); 95 System.out.print("请输入年利率："); 96 double rate = scanner.nextDouble(); 97 System.out.print("请输入年限："); 98 int year = scanner.nextInt(); 99 double num = 1; 100 for (int i = 1; i <= year * 12; i++) { 101 num = (1 + (rate / 12)) * num; 102 103 } 104 money = money * (1 + (rate / 12)) * (-1 + num) / (rate / 12); 105 System.out.println("定投" + year + "年后的资产总值为：" 106 + (double) (Math.round(money * 100) / 100.0)); 107 108 } 109 110 private static void YearDingtoushouyi() { 111 // TODO 自动生成的方法存根 112 Scanner scanner = new Scanner(System.in); 113 114 System.out.print("请输入每年的投资金额："); 115 double money = scanner.nextDouble(); 116 System.out.print("请输入年利率："); 117 double rate = scanner.nextDouble(); 118 System.out.print("请输入年限："); 119 int year = scanner.nextInt(); 120 double num = 1; 121 for (int i = 1; i <= year; i++) { 122 num = (1 + rate) * num; 123 124 } 125 money = money * (1 + rate) * (-1 + num) / rate; 126 System.out.println("定投" + year + "年后的资产总值为：" 127 + (double) (Math.round(money * 100) / 100.0)); 128 129 } 130 131 private static void TouziRate() { 132 // TODO 自动生成的方法存根 133 Scanner scanner = new Scanner(System.in); 134 System.out.print("请输入投资金额："); 135 double money1 = scanner.nextDouble(); 136 System.out.print("请输入收获金额："); 137 double money2 = scanner.nextDouble(); 138 139 System.out.print("请输入年限："); 140 int year = scanner.nextInt(); 141 double rate; 142 rate = Math.pow(money2 / money1, 1.0 / year) - 1; 143 System.out.println("所需年利率为：" 144 + (double) (Math.round(rate * 10000) / 10000.0)); 145 146 } 147 148 private static void TouziYear() { 149 // TODO 自动生成的方法存根 150 Scanner scanner = new Scanner(System.in); 151 System.out.print("请输入投资金额："); 152 double money1 = scanner.nextDouble(); 153 System.out.print("请输入收获金额："); 154 double money2 = scanner.nextDouble(); 155 156 System.out.print("请输入年利率："); 157 double rate = scanner.nextDouble(); 158 double year; 159 year = Logarithm.log(money2 / money1, 1 + rate); 160 year = Math.ceil(year); 161 System.out.println("需要存入的年限为：" + year); 162 163 } 164 165 private static void BenjinDanli() { 166 // TODO 自动生成的方法存根 167 Scanner scanner = new Scanner(System.in); 168 System.out.print("请输入本息："); 169 double money = scanner.nextDouble(); 170 System.out.print("请输入年利率："); 171 double rate = scanner.nextDouble(); 172 System.out.print("请输入年限："); 173 int year = scanner.nextInt(); 174 money = money * (1 / (1 + rate * year)); 175 System.out.println("单利计算需要存入的本金为：" 176 + (double) (Math.round(money * 100) / 100.0)); 177 178 } 179 180 private static void BenjinFuli() { 181 // TODO 自动生成的方法存根 182 Scanner scanner = new Scanner(System.in); 183 System.out.print("请输入本息："); 184 double money = scanner.nextDouble(); 185 System.out.print("请输入年利率："); 186 double rate = scanner.nextDouble(); 187 System.out.print("请输入年限："); 188 int year = scanner.nextInt(); 189 double num = 1; 190 for (int i = 1; i <= year; i++) { 191 num = num * (1 + rate); 192 } 193 money = money * (1 / num); 194 System.out.println("复利计算需要存入的本金为：" 195 + (double) (Math.round(money * 100) / 100.0)); 196 197 } 198 199 private static void BenxiDanli() { 200 // TODO 自动生成的方法存根 201 Scanner scanner = new Scanner(System.in); 202 System.out.print("请输入本金："); 203 double money = scanner.nextDouble(); 204 System.out.print("请输入年利率："); 205 double rate = scanner.nextDouble(); 206 System.out.print("请输入年限："); 207 int year = scanner.nextInt(); 208 money = money + money * rate * year; 209 System.out.println("存入" + year + "年后的单利计算本息为：" 210 + (double) (Math.round(money * 100) / 100.0)); 211 212 } 213 214 private static void BenxiFuli() { 215 // TODO 自动生成的方法存根 216 Scanner scanner = new Scanner(System.in); 217 System.out.print("请输入本金："); 218 double money = scanner.nextDouble(); 219 System.out.print("请输入年利率："); 220 double rate = scanner.nextDouble(); 221 System.out.print("请输入年限："); 222 int year = scanner.nextInt(); 223 for (int i = 1; i <= year; i++) { 224 money = (1 + rate) * money; 225 } 226 System.out.println("存入" + year + "年后的复利计算本息为：" 227 + (double) (Math.round(money * 100) / 100.0)); 228 229 } 230 }
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