C/Visual C - copiar la segunda cadena de 3 y guardarla en una nueva variable

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

typedef struct StrList

{

	int len;

	char *str;

}StrList;

StrList *strlist;

char st1[] = "cadena numero 1";

char st2[] ="cadena numero 2";

char st3[] = "cadena numero 3";

void InsertString(char *data){

	int len;

	char *p;

	len = strlen(data);

	p = strlist->str;

	memcpy(p + strlist->len,data,len);

	strlist->len += len;

	*(p + strlist->len) = 0x0;

	strlist->len++;

}

int main(void){

	char *p;

	char*c;

	char *cpy;

	char *copy;

	int i;

	int nstr=0;

	strlist = malloc(sizeof(StrList));

	strlist->str = malloc(8192);

	copy = malloc(1024);

	strlist->len =0;

	InsertString(st1);

	InsertString(st2);

	InsertString(st3);

	cpy = copy;

	p = strlist->str;

	for( i =0; i < strlist->len; i++ , c = p++){

		if(*c == 0x0)

			nstr++;

		if(nstr ==1)

			*cpy++ = *p;

	}

	*cpy = 0x0;

	printf("%s", copy);

	free(strlist->str );

	free(strlist);

	free(copy);

	return 0;

}