void main(){char * data;union_type my_union;data=NULL;data=new char[100];my_union.a=data;{char * data=my_union.b;free(data);}}
static void main(){char * data;union_type my_union;data=NULL;data=new char[100];my_union.a=data;{char * data=my_union.b;delete [] data;}}