A585.2进制转换

#include<iostream>
using namespace std;
char numbers[36]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
string jinzhi(int num,int k){
	string str="",rts="";
	while(num){
		str+=numbers[num%k];
		num/=k;
	}
	for(int i=str.length()-1;i>=0;i--)
		rts+=str[i];
	return rts;
}
int main(){
	int n;
    cin>>n;
    cout<<jinzhi(n,2);
	return 0;
}