include iostream using namespace std union coordinate int integer doub

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#include <iostream>
using namespace std;
union coordinate {
int integer;
double _double;
void init() {
cin >> _double;
if ((int) _double == _double) {
integer = (int) _double;
}
}
double show() {
if (_double != NULL) return _double;
return integer;
}
};
struct coordinate_system {
coordinate x;
coordinate y;
coordinate z;
};
int main() {
struct coordinate_system point;
cout << "Enter value of x: ";
point.x.init();
cout << "Enter value of y: ";
point.y.init();
cout << "Enter value of z: ";
point.z.init();
cout << "x = " << point.x.show() << "; y = " << point.y.show() << "; z = " << point.z.show() << ";";
}