btw, is this the best place to post these type of questions, or should I go somewhere else, like general?
Edited by - tryandgetme on September 5, 2001 2:03:30 PM
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help with class constructors
Author
hi all.
I wrote a class for a simple game I'm making, and I'm getting stuck with the constructor. I've never had problems with classes before cause I've never needed constructors. I wrote the class and constructor with the tutorial right beside me, and as far as I can see from the tutorial, it should work. the compiler is giving me the error:
chopper.cc:34: return type specification for constructor invalid
here's the class and it's constructor
class chopper {
public:
chopper();
~chopper();
private:
int angle;
int turnrate;
float x, y, currentspeed, maxspeed, accel ,drag;
void userinput();
void animate();
};
chopper::chopper()
{ /*this is the line it's complaining about*/
angle = 0;
x = 320;
y = 200;
maxspeed = 10;
currentspeed = 0;
accel = 0.25;
turnrate = 4;
drag = 0.1;
}
thanks for any help you can give
btw, is this the best place to post these type of questions, or should I go somewhere else, like general?
Edited by - tryandgetme on September 5, 2001 2:03:30 PM
btw, is this the best place to post these type of questions, or should I go somewhere else, like general?
Edited by - tryandgetme on September 5, 2001 2:03:30 PM
Your class compiles without any errors with VC++. It only gives a warning that the value assigned to
I hope you also defined the destructor of the chopper class. When I created an instance of class chopper it complained that the destructor isn''t defined. (needs something like
Which compiler are you using? VC++ needs the extension .cpp for c++ source files.Maybe you just have to recompile everything.
baumep
drag is converted from const double to float which can be avoided by writing an "f" behind the number (drag = 0.1f.I hope you also defined the destructor of the chopper class. When I created an instance of class chopper it complained that the destructor isn''t defined. (needs something like
chopper::~chopper() { /*destroy object*/ })Which compiler are you using? VC++ needs the extension .cpp for c++ source files.Maybe you just have to recompile everything.
baumep
Author
I'm using the DJGPP compiler for dos (www.djgpp.org). it did everything just fine until I added the constructor and destructor. maybe I should stop calling it names 
hmm...I guess I'll just keep working at it and see what I come up with. anyone out there use the DJGPP compiler and have this problem?
and, if no one can help me with that, can you help me understand the error message better?
Edited by - tryandgetme on September 5, 2001 6:47:09 PM
hmm...I guess I'll just keep working at it and see what I come up with. anyone out there use the DJGPP compiler and have this problem?and, if no one can help me with that, can you help me understand the error message better?
Edited by - tryandgetme on September 5, 2001 6:47:09 PM
Author
ok, I did some fiddling around, tried devc++ (www.bloodshed.net) , djgpp, and the compiler that comes with Redhat linux 7, and ms visual c++. the error only happens when using linux, devc++ or djgpp. devc++ and linux both use the gcc compiler, and devc++ uses mingw. does this make any sense to anyone?
This is against all rules of c++ and may sound crazy but probably your compiler expects a
Try to implement your constructor as
baumep
void return type to the definition of the constructor.Try to implement your constructor as
void chopper::chopper() {...} and see if it results in an error (it should). Or try putting a void before the declaration of the constructor.baumep
Author
As it turns out, I did make my class right, but made a typeing error that took me a week to catch. everything works great now. Thanks for your help.
This topic is closed to new replies.
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