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

int main(void) {
	double A[5] = {
	 [0] = 9.0,
	 [1] = 2.9,
	 [4] = 3.E+25,
	 [3] = .00007,
	};

	for(size_t i = 0; i < 5; ++i) {
		printf("element %zu is %g, \tits square is %g\n", i, A[i], A[i]*A[i]);
	}

	return EXIT_SUCCESS;
}