华为机试句子重量-华为机试

#include<iostream>
#include<string>
#include<vector>
using namespace std;
int main() {
	string s;
	int i=0;
	getline(cin, s);
	s += ' ';
	int cnt = 0;
	int end = 0;
	int begin = -1;
	int sum = 0;
	while (end < s.size()){
		while (s[end] != ' ') {
			++end;
		}
		sum += end -1- begin;
		begin = end;
		cnt++;
		++end;
	}
	printf("%.2lf", (double)sum / cnt);
}