26进制——蓝桥杯2019B——年号字符串

#include<iostream>
using namespace std;
int main() {
	int num = 0,n = 2019;
	char ans[5];
	do {
		ans[5 - num - 1] = 'A' + n % 26 -1;
		n /= 26;
		num++;
	} while (n != 0);
	for (int i = num; i > 0;i--) {
		cout << ans[5 - i];
	}
	return 0; 
}