structhack.c

/*

   This was discussed in http://www.c-faq.com/struct/structhack.html 
   
   Despite its popularity, the technique is also somewhat notorious: 
   Dennis Ritchie has called it ``unwarranted chumminess with the C implementation,''
   and an  official interpretation has deemed that it is not strictly conforming with 
   the C Standard, although it does seem to work under all known implementations. 
   
   (Compilers which check array bounds carefully might issue warnings.) 

   gcc -o structhack -Wall -ggdb structhack.c

*/

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

struct name {
	int namelen;
	char namestr[1];
};

int main(int argc, char *argv[]) {

 char *newname="www.coding.com.br";
 struct name *ret = malloc(sizeof(struct name)-1 + strlen(newname)+1);
 
 if (ret != NULL) {
    ret->namelen = strlen(newname);
    strcpy(ret->namestr,newname);
 }

 printf("%s \n",ret->namestr); 

 return 0;

}