an example of calloc from the cpp reference documentation

calloc.c

int calloc_example(){
	int* p1 = calloc(4, sizeof(int)); // an array of 4 integers
	int* p2 = calloc(1, sizeof(int[4])); // same thing, but mixed up where the size and space goes. (it doesn't matter)
	int* p3 = calloc(4, sizeof *p3); // same thing but without using int, instead using the dereferenced version of p3

	if(p2) {
		for(int n = 0; n < 4; n++) // printing array
			printf("p2[%d] == %d\n", n, p2[n]);
	}

	free(p1);
	free(p2);
	free(p3);
}