#include <iostream>

using namespace std;

float fun1(int&){ return 1.0; }
float fun2(const int&){ return 1.0; }

int main(void){
  double v = 3.14159;
  //fun1(v);
  fun2(v);
  
  return 0;
}

/*
  double v = 3.14159;
  const int &ri = v;

  int temp = v;
  const int &ri = temp;
*/