include iostream using namespace std union value int integer double _d

#include <iostream>

using namespace std;

union value {
    int integer;
    double _double;

    void init() {
        cin >> _double;
        if ((int) _double == _double) {
            integer = (int) _double;
        }
    }

    double get() {
        if (_double != NULL) return _double;
        return integer;
    }
};


int main() {
    value variable;

    cout << "Enter value of variable (integer or double): ";
    variable.init();

    cout << "Value = " << variable.get();
}