题解 | #十进制整数转十六进制字符串#

#include <iostream>
#include <string>
using namespace std;

string toHexString(int n);

int main() {

    int n;
    cin >> n;

    string hexStr = toHexString(n);
    cout << hexStr << endl;

    return 0;
}

string toHexString(int n) {
    // write your code here......
    int y;
    string s;
    while (n > 0) {
        y = n % 16;
        if (y < 10) s = char('0' + y) + s;
        else s = char('A' - 10 + y) + s;
        n = n / 16;
    }
    return s;
}