백준 4358 생태학

https://www.acmicpc.net/problem/4358

4358번: 생태학

#include <iostream>
#include <string>
#include <map>
#include <string.h>

using namespace std;
int main()
{
	int i = 0;
	map<string, int> m;
	char tree[31];
	int ch = 0;
	int k = 0;
	while (!cin.eof())
	{
		cin.getline(tree, 31, '\n');
		k++;
		if (m.find(tree) == m.end())
		{
			m.insert({ tree, 1});
		}
		else
		{
			(m.find(tree)->second)++;
		}
	}
	k -= 1;

	for (auto iter = m.begin(); iter != m.end(); iter++)
	{
		if (iter->first == "")
			continue;
		cout << iter->first;
		int cnt = iter->second;
		float per = (float)cnt / (float)k * (float)100;
		printf(" %.4f\n", per);
	}

	return 0;

}