字符串p型编码c++

#include 
using namespace std;
int main()
{
	int l = 1;
	string str, s;
	cin >> str;
	s = str + str[0];
		for (int i = 1; i < s.size(); i++)
		{
			if (s[i] != s[i - 1])
			{
				cout << l << s[i-1];
				l = 1;
			}
			else
			{
				l = l + 1;
			}
		}
}