#include <stdio.h>
double product(float a[],int size);

main()
{
	const int size = 100;
    int f;
	float a[];

	printf("please enter size you want ");
	scanf("%d", &size );
product(a[],size );
printf("the product is %d",f);
return 0;
}



double  product(float a[],int size )
{
	double f=1;
	int i;
	for (i=0;i<size ;i++)
		f*=a[i];
	return f;
}