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

int main() {
	char * cp = 0;
	unsigned int * uip = 0;
	unsigned int cp_size = sizeof(cp) * 8;
	unsigned int uip_size = sizeof(uip) * 8;

	printf("\n");

	if (  cp = (char *)malloc( cp_size )  ) {
		printf(" malloc #1 succeeded, start is %u, size %u\n", &cp, cp_size);
	} else {
		printf(" malloc #1 failed!\n");
	}

	if (  uip = (unsigned int *)malloc( uip_size )  ) {
		printf(" malloc #2 succeeded, start is %u, size %u\n", &uip, uip_size);
	} else {
		printf(" malloc #2 failed!\n");
	}

	if ( cp ) { free(cp); }
	if ( uip ) { free(uip); }

	printf("\n");
	return 0;
}

/*
   output on my system is:

     malloc #1 succeeded, start is 3217024436, size 32
     malloc #2 succeeded, start is 3217024432, size 32

   Q: Why does #2 OVERLAP #1?
      Do I need to somehow "lock" malloc-allocated memory to
        prevent this from happening?

*/