floattest.c

#include <stdio.h>

union u {
	int i;
	float f;
};

int main(void)
{
	union u test, test2, res;

	test.i = 4;
	test2.f = 1.0f;
	
	res.f = test.f * test2.f;
	printf("%f %.8x\n", res.f, res.i);

	return 0;
}