#include<iostream>
using namespace std;

template<typename T>
void triple_in_place(T *tomod){
	*tomod *= 3;
}

int main(){

	float w = 6;
	triple_in_place(&w);
	cout << w << endl;

	double x = 8;
	triple_in_place(&x);
	cout << x << endl;
	return 0;
}