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How do I append a number to the end of a string (and get a string back)? For example, I want to run a for() loop similar to: for(i = 0; i < num; i++), and for each pass through the loop I want to...

How would you do this using iterators? I need to learn how to do it this way, I think this is what's confusing me from most of the insertion sort examples I've seen using arrays.

I want to use insertion sort to sort a vector containing some classes. Each class has a string name variable like this:


class myClass {
string name;
...
}

I want to sort the vector by...

use an iterator

Let's say I have a string s:

string s = "How are YOU doING toDay?"

I want to convert this string so that only the first letter of each word is capitalized (so I want it to be: "How Are You...

vart, that works! thanks. Just one more question about copy constructors in general: You can specify additional parameters for a copy constructor (in addition to the reference to same class type) as...

Well bClass[] is actually dynamically allocated with
bClass[i] = new aClass(arg1, arg2); looping through a for loop in a separate function (arg1 and arg2 are arguments to the constructor for...

Suppose I have a class like this:

class aClass {
char *ptr; // random variable, not important
int time;
aClass *bClass[5];
public:
aClass();
~aClass();
aClass(const aClass&...

Ok, I've encountered another problem in this program. So far I've implemented mkdir() and ls() that both work, however I've been trying for the past day to be able to do this: When the program first...

Ok I got this to work!:

(*(*funix).currentDirectory).subDir = (Directory**)malloc(3*sizeof(struct Dir *));
funix->currentDirectory->subDir[0] = (Directory*)malloc(sizeof(Directory));
...

Ahh ok, so I managed to dynamically allocate subDirs, but I'm getting an error when trying allocate subDir.name:

(*(*funix).currentDirectory).subDir = (Directory**)malloc(3*sizeof(struct Dir *));...

Ok got it.

Now with a question for actually creating directories with function mkdir():
When the user enters a mkdir command, I call the mkdir() function:

void mkdir(Funix *funix, int...

Ok so this isn't a structs question, but I've moved on to actually getting a command from the user. I want to store the number of arguments and also how many arguments. This is what I have now in...

Why wouldn't that work? You can do something like this:
char *str;
while (str != NULL) {
str = strtok(line, ":"); // <- this will store "somefile"
str = strtok(NULL, ":"); // <- now str will...

Thanks Elysia, for the casting I learned to not cast it either, but for this assignment we are supposed to compile it with g++ (I'm not sure why exactly..) and I always get an error if I don't cast...

Oh I see. I realize I made a mistake in my Directory struct though, the Permissions struct should not be defined in it like that, instead (I think) I want a pointer to an instance of the Permissions...

Hm yes that does seem to work, what does it do exactly? Is there another way of doing this? I only remember learning a little bit about the -> operator a while ago, don't remember much now. thanks

Oh, I see, stupid mistake. Thanks

So it works now when I want to access the Funix struct (i.e. (*funix).umask = 666), but I still can't access the Directory struct. I tried this:
...

So if I understand you correctly I first have to do this in init()?:

Directory *currentDirectory = (Directory*)malloc(sizeof(Directory));
(*currentDirectory).name = (char*)malloc(sizeof(char));
...

Oh my bad, yeah it is Funix sorry.

So I first do Directory *currentDir? How would I access it? (*funix).currentDir.name? I havent seen that before, that's probably wrong.

thanks!

For a programming assignment I have the following two structs: (sorry it's a bit long!)


typedef struct Dir
{
char *name;
struct Dir** subDir;
struct Dir* parent;
struct
{

For this program I have to write it seems I have to use a struct within a struct. I tried simply doing this:


typedef struct
{
...
typedef struct
{
...
...

Oh I see, yes rooms is declared "Room *rooms" in main(). thanks

In an example program my professor gave me that reads data from a file about rooms. For example the data file reads:

Bill Mueller
129450.93 4
2:300.5:Living Room
1:107.0:Bedroom 1...

I want to use fread() to read a binary file containing Passenger structs like this:


typedef struct
{
int ID;
char first_name[15];
char last_name[15];
int flight_nums[4];
}...