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new and delete commands

JSCFaith · 2001-05-14T03:10:14

Hey I am trying to use the 'new' and 'delete' with a class with a linked list. The problem is this: //I have a class as follows. class Bullet : public GameObject { public: Bullet() { Type = BULLET; Damage = 5; DistanceFlown = 0; // Add to linked List if( pBulletFirst == 0 ) { // this is the first node pBulletFirst = this; pBulletFirst->pBulletPrev = NULL; } else { pBulletLast->pBulletNext = this; this->pBulletPrev = pBulletLast; } pBulletLast = this; this->pBulletNext = NULL; } ~Bullet() { if (this->pBulletPrev == NULL) pBulletFirst = this->pBulletNext; else this->pBulletPrev->pBulletNext = this->pBulletNext; if (this->pBulletNext == NULL) pBulletLast = this->pBulletPrev; else this->pBulletNext->pBulletPrev = this->pBulletPrev; } int Draw(LPDIRECTDRAWSURFACE7 PrimarySurface); static int DrawBullets(LPDIRECTDRAWSURFACE7 PrimarySurface); //. Sets the damage void SetDamage(int NewDamage) { Damage = NewDamage; } // Set Velocity void SetBulletVelocity(int Direction); // Gets the Damage int GetDamage() { return Damage; } Bullet *GetNextBullet() { return(pBulletNext); } static Bullet *GetFirstBullet() { return(pBulletFirst); } void CheckBulletCollisions(); // Shoots a bullet static void CreateBullet(float x, float y, int Direction); static void DestroyBullet(Bullet *pBullet); protected: // Linked list stuff static Bullet *pBulletFirst; static Bullet *pBulletLast; Bullet *pBulletNext; Bullet *pBulletPrev; // Bullet Damgae int Damage; static int Range; int DistanceFlown; }; // End of the class // Now when I try to use the 'new' command like this: Asteroid *NewAsteroid; // Create the new asteroid NewAsteroid = new Asteroid; // When ever I do this the program crashes. // Am I using it incorrectly? Well I tried to use the new command with a very simple class with no linked list and it still crashed. So I know it is not the class that is messed up. (Well I am 90% sure) Does anyone know what I am doing wrong? Thanks... [/source] Edited by - JSCFaith on May 13, 2001 1:26:38 AM

General and Gameplay Programming Programming

Started by JSCFaith May 13, 2001 12:25 AM

9 comments, last by JSCFaith 23 years, 9 months ago

JungleJim

122

May 14, 2001 03:10 AM

Why mix-up a Bullet and a linked list? It''s way better to use a different class for your linked list (STL''s std::list comes to mind) than to combine a Bullet and a linked list in one class.

Some useful C++ links:Free multiplatform ANSI C++ Standard Library implementation Visual C++ 6.0 STL fixes Visual C++ 6.0 noncompliance issues C++ FAQ Lite

new and delete commands

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new and delete commands

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