tier 2 class struct error - GameCreators Forum

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fubarpk

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Joined: 11th Jan 2005

Playing: AGK is my friend

Posted: 23rd May 2017 02:50

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I thought ide convert an agk program to tier 2 for some extra frame rates but my c++ is very rusty
I am getting the error message left of WaveWidth must have class/struct/union

declarations

+ Code Snippet

typedef struct mySprite
{
int id; //				id of sprite
int PointX; //			makes it move
int centreX; //			centre of sine wave x axis

int yPosition; //		yPosition on y - axis
int amplitude; //		the heaight of the wave
float speedX; //		how fast sine travels on x - axis
int WaveWidth; //		how wide the sinewave is
float frequency;//		speed sprite should move up and down(0.0 to 6.0)
int img;//				holds the image number for the sprite
}mySprite;

mySprite spr[strlen];

the error occurs here

+ Code Snippet

xWave = agk::Sin(spr[num].PointX)*(spr[num].WaveWidth / 2) + spr[num].centreX;

thanks any help would be appreciated

fubar

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Paul Johnston

TGC Developer

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Joined: 16th Nov 2002

Location: United Kingdom

Posted: 24th May 2017 00:40 Edited at: 24th May 2017 00:40

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Personally I'd just declare it like so

+ Code Snippet

struct mySprite
{
int id; //              id of sprite
int PointX; //          makes it move
int centreX; //         centre of sine wave x axis
 
int yPosition; //       yPosition on y - axis
int amplitude; //       the heaight of the wave
float speedX; //        how fast sine travels on x - axis
int WaveWidth; //       how wide the sinewave is
float frequency;//      speed sprite should move up and down(0.0 to 6.0)
int img;//              holds the image number for the sprite
};

mySprite spr[strlen];

Although I'd be careful using "strlen" as the array size, since that is a function in C++.

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fubarpk

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Joined: 11th Jan 2005

Playing: AGK is my friend

Posted: 24th May 2017 01:07

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your right about strlen being a problem as changing it to strLength fixed the errors I had, I didn't expect that as I wasn't using string.h

fubar

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