#include<iostream>
class Per {
public:
	double score;
	Per(double s) { this->score = s; }
	Per() {}
};
struct KV {
public:
	int key;
	int value;
	Per p;
	KV(int key, int value, Per p) :key(key), value(value), p(p) {}
	KV() {}
};
int main() {
	KV tmp = {
		1,2,Per(6.0)
	};

	KV tmp2 = {
		.key = 3,
		.value = 2,
		.p = {
			6
		}
	};
}