python/TangDou/XiTi/1157.cpp

#include <bits/stdc++.h>

using namespace std;

//函数：十进制转任意进制
string tenToR(int n, int r) {
    if (n == 0) return "0";
    //十进制n转r进制 ，返回字符串s
    string str = "";
    stack<int> s;
    while (n) {
        s.push(n % r);
        n = n / r;
    }
    while (!s.empty()) {
        switch (s.top()) {
            case 10:
                str += 'A';
                break;
            case 11:
                str += 'B';
                break;
            case 12:
                str += 'C';
                break;
            case 13:
                str += 'D';
                break;
            case 14:
                str += 'E';
                break;
            case 15:
                str += 'F';
                break;
            default:
                str += s.top() + '0';
        }
        s.pop();
    }
    return str;
}

int main() {
    cout << tenToR(100, 7) << endl;
    return 0;
}