(SDL) Putting an integer in a char*?

[Yart]

EDIT: Solved relatively quickly. New question in post 3.



Hi.

I'm very new to SDL and I'm currently fooling around with it. I want to set the window caption to a string. However, I'm pretty dum so I have no clue how to do this correctly lol

For my string I put

std::string title = "Ball Bounce";

And for the Caption I put

SDL_WM_SetCaption(title, NULL );

I get the error
"cannot convert `std::string' to `const char*' for argument `1' to `void SDL_WM_SetCaption(const char*, const char*)' "

I have included <string> and "sdl.h".

Uh... what should I put in the SDL_WM_SetCaption thing instead? Or is there something I just missed?

[Code Assassin]

Well, you could try this:

char* title = "Ball Bounce";

instead of using std::string title = "Ball Bounce";

This should work :D

Or, you could save yourself the time and just do something like this:

SDL_WM_SetCaption("Ball Bounce", NULL);

[Yart]

Oh yea... derp!!

I wanted to put it in a value so I could change the string on the fly with a number that goes up constantly beside the title.

But now I got the problem of making a string with a variable in it... lol

char* title = "Ball Bounce - " && ballcount && " Balls";

Gives me
"cannot convert `bool' to `char*' in initialization "

Which is understandable. I forget how to include an integer in a string of sorts (as it is it thinks it's a boolean because it's 1). Can anyone refresh me?

[Code Assassin]

Maybe this can assist you:

http://www.daniweb.com/software-development/cpp/threads/108931

Here's the documentation:

http://www.cplusplus.com/reference/clibrary/cstdio/sprintf/

[clanmjc]

This answers your first question, which makes your second question easy.

For my string I put

std::string title = "Ball Bounce";

And for the Caption I put

//This was your error...
SDL_WM_SetCaption(title, NULL );

//This fixes your error...
SDL_WM_SetCaption(title.c_str(), NULL );

Now keep using the std::string and build your title much easier than using the char *. Use a stringstream to concat the numbers onto the string.

[Code Assassin]

@clanmjc

Now keep using the std::string and build your title much easier than using the char *.

O.o What do you mean easier?

[clanmjc]

Poor choice of words, we use boost, so string manipulations are very trivial with lexical cast especially when concat like the OP is doing.

[Yart]

Ah thanks!

clanmjc's suggestion did the trick. Program's working perfectly now!

Awesome!