How to concatenate 2 words in VC++?

[softwareguy74]

Hi,

I've read through some examples that show how to concatenate strings but can't seem to get any of them to work in a Win32 app.

What I would like to do is the following:

char* val1;
char* val2;

MessageBox(hDlg,val1 + " " + val2,"Info",MB_OK);

Now I know that wont work as it is but I just wanted to make it clear what I wanted to do..

I'm not using MFC.

Any help and examples would be greatly appreciated..

Dan

[Jop]

You could use the
lstrcat api:

MessageBox(hDlg,lstrcat(val1, val2),"Info",MB_OK);

But if you include string you could also concatenate using the + you provided.

#include <string.h>

.
.
.

char buffer1[] = "Hello";
char buffer2[] = "You";
strcat(buffer1, ", ");
strcat(buffer1, buffer2);

cout<<buffer1<<endl;

[parksie]

#include <string>

using std::string;

...

char *one = "Hello";
char *two = "World";

MessageBox(NULL, string(one) + " " + two, "Message", MB_OK);

[Jop]

He already uses the MessageBox API call, so he probably already has
#include windows.h

so why not use the
lstrcat from the windows.h?
Saves you one header file

[parksie]

You have to be careful not to get inconsistencies between the way all the arrays are allocated. For example, there are 3 ways just off the top of my head:

new / delete / delete[] (c++)
malloc / free (c)
GlobalAlloc / GlobalFree (windows)

The strcat functions automatically extend the char* array - so if it uses a different allocation method to the one you originally used to make the string, then you'll get a GPF

[softwareguy74]

Thanks guys! ChimpFace9000's code works but I can't seem to get Jop's code to work.. On Jop's, it doesn't error out but it just doesn't show the MessageBox when I put the lstrcat(val1,val2) in there.. Oh well.. I would've liked to use that cause it's a lot cleaner..