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@ -2,83 +2,68 @@ import java.util.Scanner;
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public class computer {
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public class computer {
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// 将任意进制数转换为十进制数
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// 将任意R进制数X转换为十进制数
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public static int toDecimal(String number, int base) {
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public static int baseToDecimal(String x, int r) {
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int decimal = 0;
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int decimalValue = 0;
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int power = 0;
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int length = x.length();
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// 从字符串的末尾开始遍历
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for (int i = 0; i < length; i++) {
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for (int i = number.length() - 1; i >= 0; i--) {
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char digit = x.charAt(length - 1 - i); // 从右往左处理
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char digit = number.charAt(i);
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int value;
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int value;
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// 处理0-9的数字字符
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if (Character.isDigit(digit)) {
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if (digit >= '0' && digit <= '9') {
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value = digit - '0'; // 数字字符
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value = digit - '0';
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}
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// 处理A-F(或a-f)的十六进制字符
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else if (digit >= 'A' && digit <= 'F') {
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value = digit - 'A' + 10;
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} else if (digit >= 'a' && digit <= 'f') {
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value = digit - 'a' + 10;
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} else {
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} else {
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throw new IllegalArgumentException("Invalid character in number: " + digit);
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value = Character.toUpperCase(digit) - 'A' + 10; // 字母字符
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}
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}
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decimalValue += value * Math.pow(r, i);
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// 根据当前字符的权重(即它在数中的位置)累加其值
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decimal += value * Math.pow(base, power);
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power++;
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}
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}
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return decimalValue;
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return decimal;
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}
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}
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public static String fromDecimal(int decimal, int base) {
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// 将十进制数转换为R进制数
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if (base < 2 || base > 16) {
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public static String decimalToBase(int num, int r) {
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throw new IllegalArgumentException("Base must be between 2 and 16");
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if (num == 0) {
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return "0";
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}
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}
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StringBuilder number = new StringBuilder();
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StringBuilder result = new StringBuilder();
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// 当十进制数大于0时,持续转换
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while (num > 0) {
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while (decimal > 0) {
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int remainder = num % r;
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int remainder = decimal % base;
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char digit;
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// 处理0-9
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if (remainder < 10) {
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if (remainder < 10) {
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digit = (char) ('0' + remainder);
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result.append(remainder); // 数字字符
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} else {
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result.append((char) ('A' + (remainder - 10))); // 字母字符
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}
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}
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// 处理10-15(A-F)
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num /= r;
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else {
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digit = (char) ('A' + (remainder - 10));
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}
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}
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number.insert(0, digit); // 在字符串的开头插入新的字符
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return result.reverse().toString(); // 反转结果
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decimal /= base; // 更新十进制数,去掉已转换的部分
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}
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}
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// 如果转换后的字符串为空(即输入的十进制数为0),则返回"0"
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// 将任意R进制数X从进制R_from转换到进制R_to
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return number.length() == 0 ? "0" : number.toString();
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public static String convertBase(String x, int rFrom, int rTo) {
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int decimalValue = baseToDecimal(x, rFrom); // 转换为十进制
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return decimalToBase(decimalValue, rTo); // 转换为目标进制
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}
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}
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public static void main(String[] args) {
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public static void main(String[] args) {
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Scanner scanner = new Scanner(System.in);
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Scanner scanner = new Scanner(System.in);
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// 输入原始进制数和目标进制
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System.out.print("请输入要转换的进制数(例如:1A):");
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System.out.print("输入原始数字的基数(2-16): ");
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String x = scanner.nextLine();
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int originalBase = scanner.nextInt();
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System.out.print("输入原始数字输入要转换的基数(2-16): ");
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System.out.print("请输入原始进制(2-16):");
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String originalNumber = scanner.next();
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int rFrom = scanner.nextInt();
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System.out.print("输入要转换的基数(2-16): ");
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System.out.print("请输入目标进制(2-16):");
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int targetBase = scanner.nextInt();
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int rTo = scanner.nextInt();
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// 转换并输出结果
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// 调用转换函数
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int decimal = toDecimal(originalNumber, originalBase);
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String result = convertBase(x, rFrom, rTo);
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String convertedNumber = fromDecimal(decimal, targetBase);
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System.out.println("转换后的号码是: " + convertedNumber);
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System.out.printf("%s 从 %d 进制转换到 %d 进制的结果是: %s\n", x, rFrom, rTo, result);
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scanner.close();
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scanner.close();
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}
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}
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