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zuoye.cpp

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+#include <iostream>
+#include <string>
+#include <cmath>
+#include <algorithm>
+
+using namespace std;
+
+// 符号转化为数字
+int get_num(char c) {
+    if (isdigit(c)) {
+        return c - '0';
+    }
+    if ('a' <= c && c <= 'z') {
+        return c - 'a' + 10;
+    }
+    if ('A' <= c && c <= 'Z') {
+        return c - 'A' + 10;
+    }
+    return 0;
+}
+
+// 数字转化为符号
+char get_char(int num) {
+    return '0';
+}
+
+//将字符串根据进制转化为数字
+int to_num(string& number, int base) {
+    int n = number.size();
+    long long num = 0;
+    for (int i = 0; i < n; i++) {
+        char ch = number[i];
+        num *= base;
+        num += get_num(ch);
+    }
+    return num;
+}
+
+
+//将数字根据进制转化为字符串
+string tostring(int num, int base) {
+    if (num == 0) return "0";
+
+    string ans;
+    while (num > 0) {
+        ans += get_char(num % base);
+        num /= base;
+    }
+    reverse(ans.begin(), ans.end());
+    return ans;
+}
+
+string convertBase(string& num, int st_base, int en_base) {
+    return tostring(to_num(num, st_base), en_base);
+}
+
+int main() {
+    string number;
+    int st_base, en_base;
+
+    cout << "输入数字：";
+    cin >> number;
+    cout << "输入源进制（2-16）：";
+    cin >> st_base;
+    cout << "输入目标进制（2-16）：";
+    cin >> en_base;
+
+    string ans = convertBase(number, st_base, en_base);
+    cout << "转换后的数字是：" << ans << endl;
+
+    return 0;
+}
+