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zuoye.cpp

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+#include <iostream>
+#include <string>
+#include <cmath>
+#include <algorithm>
+
+int toDecimal(const std::string& num, int base) {
+    int decimalValue = 0;
+    for (char digit : num) {
+        decimalValue *= base;
+        decimalValue += (isdigit(digit) ? digit - '0' : digit - 'A' + 10);
+    }
+    return decimalValue;
+}
+
+std::string fromDecimal(int decimalValue, int base) {
+    if (decimalValue == 0) return "0";
+
+    std::string result;
+    while (decimalValue > 0) {
+        int remainder = decimalValue % base;
+        result += (remainder < 10 ? '0' + remainder : 'A' + (remainder - 10));
+        decimalValue /= base;
+    }
+    std::reverse(result.begin(), result.end());
+    return result;
+}
+
+std::string convertBase(const std::string& num, int fromBase, int toBase) {
+    return fromDecimal(toDecimal(num, fromBase), toBase);
+}
+
+int main() {
+    std::string number;
+    int fromBase, toBase;
+
+    std::cout << "输入数字：";
+    std::cin >> number;
+    std::cout << "输入源进制（2-16）：";
+    std::cin >> fromBase;
+    std::cout << "输入目标进制（2-16）：";
+    std::cin >> toBase;
+
+    std::string convertedNumber = convertBase(number, fromBase, toBase);
+    std::cout << "转换后的数字是：" << convertedNumber << std::endl;
+
+    return 0;
+}