Question

How to use union with constructor and method in C++

Answer 1

#include <iostream>

using std::cout;
using std::endl;

union Test {
	Test(int number);  
	void show(void);
	int n;
	char arr[4];
};

Test::Test(int number)
{
	n = number;
}

void Test::show(void)
{
	cout << arr[0] << " ";
	cout << arr[1] << "";
	cout << arr[2] << "";
	cout << arr[3] << endl;
}

int main(void)
{
	Test u1(97);
	u1.show();
	
	Test u2(987);
	u2.show();

	return 0;
}

/*
run:

a
█ ♥

*/

 

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