Answer Posted / core_coder

#include <stdio.h>

struct node {
int x;
int y;
};

unsigned int find_size ( void* p1, void* p2 )
{
return ( (char*)p2 - (char*)p1 );
}

int main ( int argc, char* argv [] )
{
struct node data_node;
int x = 0;

printf ( "\n The size :%d",
find_size ( (void*) &data_node,
(void*) ( &data_node +
1 ) ) );
printf ( "\n The size :%d", find_size ( (void*) &x,
(void*) ( &x + 1 ) ) );
}

this will work for any data type

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