Different regions have very different addresses. If they were in the same region, they would have similar addresses. Better example, where we allocate 2 objects in each region:
#include <stdio.h>
#include <stdlib.h>
int main (void)
{
int stack1;
int stack2;
static int bss1;
static int bss2;
static int data1=1;
static int data2=1;
int* heap1 = malloc(1);
int* heap2 = malloc(1);
char* rodata1 = "hello";
char* rodata2 = "world";
printf(".stack\t%p %p\n", &stack1, &stack2);
printf(".bss\t%p %p\n", &bss1, &bss2);
printf(".data\t%p %p\n", &data1, &data2);
printf(".heap\t%p %p\n", heap1, heap2);
printf(".rodata\t%p %p\n", rodata1, rodata2);
free(heap1);
free(heap2);
}
Output (for example):
.stack 000000000022FE2C 000000000022FE28
.bss 0000000000407030 0000000000407034
.data 0000000000403010 0000000000403014
.heap 0000000000477C50 0000000000477C70
.rodata 0000000000404000 0000000000404006
As you can see the two variables in the same segment have nearly identical addresses, the only difference being the size of the objects (and possibly some room for alignment). While they have very different addresses compared to variables in the other segments.