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String Concatenation C++ not Torque Script...

by Quinton Delpeche · in Torque 3D Professional · 03/06/2014 (4:23 am) · 7 replies

I am trying to find a more elegant way of concatenating a couple of strings in C++.

basically I have the following items:
- variable1 contains a string (e.g. Fred).

I need to concatenate "-Bob" and "-George" and "-Ted" to variable one ... so that my result will be:
Fred-Bob-George-Ted


This is a pretty simplistic example, but I think the point is made. I have looked at strcat, strcopy, wcscpy, and wcscat ... but I want to know if there is a more elegant way of doing this?


I am probably missing something very easy inside the engine that I can use ... if I have, I apologise ... but I am not happy with the above methods.


Edit:
Never mind, I decided to use Chilkat's free CkString object.

CkString str;

    str.append( variable1 );
    str.append( "-Bob" );
    str.append( "-George" );
    str.append( "-Ted" );

    // prints "Fred-Bob-George-Ted"
    Con::printf( "%s", str.getString() );

Much cleaner ... much better ... much easier.
Quinton Delpeche's profile picture
Torque Owner Quinton Delpeche
Gobbo Games

About the author

Gobbo Games is an Independent Games Development company operating from Durban in South Africa. We believe in creating high-quality cost-effective games that remain true to the belief of Independent Game Developers around the world.

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    Torque Owner Richard Ranft
    Roostertail Games
    #1
    03/06/2014 (7:01 am)
    That's oddly like std::string.....

    Andrew Mac
    #2
    03/06/2014 (8:01 am) 
    String myvar = "Fred";
myvar += "-Bob";
myvar += "-George";
myvar += "-Ted";

    Although I've become partial to StringBuilder when it's not overkill for the task:
    StringBuilder sb;
sb.append("Fred");
sb.append("-Bob");
sb.append("-George");
sb.append("-Ted");
String myStr = sb.end();

    Both were off the top of my head so syntax not guaranteed :P

    EDIT: Third one for the hell of it:
    char outStr[256];
dSprintf( outStr, 256, "%s%s%s%s", "Fred", "-Bob", "-George", "-Ted" );

    Torque Owner Nathan Martin
    TRON 2001 Network
    #3
    03/06/2014 (9:17 am)
    Indeed you can use std::string (std::basic_string<char>) or Torque's String class which are both available in Torque 3D. To pass such strings to other functions that expect const char * use the c_str() method as such:
    String str = "Fred";
str += "-Bob";
str += "-George" + "-Ted";

Con::errorf("%s is having a naming crisis!", str.c_str());

    Torque Owner Quinton Delpeche
    Gobbo Games
    #4
    03/06/2014 (9:30 am)
    @Andrew and @Nathan: Thanks ... can't believe I missed that one. *shakes head*

    I knew I was missing something obvious. Thanks again.

    Associate Tim Newell
    Max Gaming Technologies
    #5
    03/06/2014 (10:23 am)
    I use std::stringstream a lot.

    std::stringstream str;
    str << "Fred";
    str << "-Bob";
    str << "-George":
    str << "-Ted";

    Con::errorf("%s", str.str().c_str());

    Torque 3D Owner JeffH
    #6
    03/06/2014 (12:00 pm)
    I must be weird as I always tend to use the ugly "c style" strings. :P

    Torque Owner Robert Fritzen
    Phantom Games Development
    #7
    03/06/2014 (12:01 pm)
    Yeah for torque's String class the += operator is the way to go.

    Another EXTREMELY useful tool that I use a ton is String::ToString() which allows you to use sprintf formatting to get a String back.

    String test = "This is a sample string containing 1+1 which is ";
test += String::ToString("%i", 1+1);

Con::printf("%s", test.c_str());