#include <stdlib.h>
#include <stdio.h>

float * dynarray(int size);
void doubleRA(float **);

int main(void)
{
	float * fra;
	int size = 10;

	fra = (float *) calloc(size, sizeof(float));
	fra[0] = 20;
	fra[size-1] = 100;
	printf("size of fra%d\n", sizeof(fra));
	free(fra);

	fra = dynarray(20);
	printf("fra: %p", fra);
	doubleRA(&fra);
	printf("  fra after double: %p\n", fra);
	fra[29] = 10;

	float * temp = realloc(fra, sizeof(float)*size*2);
	if (temp != NULL)
		fra = temp;
}

void doubleRA(float **fr)
{
	*fr = realloc(fr, sizeof(fr)*2);
}


float * dynarray(int size)
{
//	float fr[20];	// statically declared local var
			// dies when method ends
	return (float *) calloc(size, sizeof(float));
}