Opengl Pointer To Array Value Pointed..?

[kvarnerexpress 0]

I'm playing around wtih openGL and trying to get the hang of c/c++(very frustrating at times). I pass a pointer to an array from an object to my main via a get method. If I print out(cout) the pointer(p) and the value pointed to (*p) from main, *p prints the decimal equivilent of the memory address p, not the value that p should be pointing to. Within the object, everything is peachy, its just when I pass the pointer to to main that this happens. The arrays plist[] and vlist[] in meshloader are the ones im having trouble with.

Any ideas? Thanks in advance. Feel free to tell me how bad my code is in general!


Code:

class MeshLoader{	  public:			MeshLoader(){};			~MeshLoader();			float * loadMesh();			int getvsize();			int getpsize();			float * getvlist();			int * getplist();	  private:			int vsize;			int psize;			float vlist[];			int plist[];};

Code:

#include <iostream>#include <fstream>#include <math.h>#include <stdlib.h>using namespace std;#include "meshloader.h"MeshLoader::~MeshLoader(){}float* MeshLoader::loadMesh(){	int i = 0;	int j = 0;	vsize = 0;	psize = 0;	vlist[100];	plist[100];	char line[255];	char tag[255];	ifstream fin("xml.x");	if(fin.is_open())	{		while(fin.getline(line, 255) != NULL)		{			strcpy(tag, line);			if(strcmp("<model>", strtok(tag, " ")) == 0)			{			}			strcpy(tag, line);			if(strcmp("<vlist>", strtok(tag, " ")) == 0)			{				vsize = atoi(strtok(NULL, " "));				for(i=0;i<vsize;i++)				{					fin.getline(line, 255);					vlist[3*i+0] = (float) atof(strtok(line, " "));					vlist[3*i+1] = (float) atof(strtok(NULL, " "));					vlist[3*i+2] = (float) atof(strtok(NULL, " "));				}			}			strcpy(tag, line);			if(strcmp("<plist>", strtok(tag, " ")) == 0)			{				psize = (int) atoi(strtok(NULL, " "));				for(i=0;i<psize;i++)				{					fin.getline(line, 255);					plist[3*i+0] = (int) atoi(strtok(line, " "));					plist[3*i+1] = (int) atoi(strtok(NULL, " "));					plist[3*i+2] = (int) atoi(strtok(NULL, " "));				}			}		}	}	cout << &plist[0] << ":";	cout << *&plist[0] << ":";	return 0;}int MeshLoader::getvsize(){	return vsize;}int MeshLoader::getpsize(){	return psize;}float * MeshLoader::getvlist(){	return &vlist[0];}int * MeshLoader::getplist(){	cout << &plist[0] << ":";	cout << *&plist[0] << ":";	return &plist[0];}

the relevant part of main:

Code:

#include <cstdlib>#include <iostream>#include <string>#include <sstream>#include <stdio.h>#include <math.h>#include <time.h>using namespace std;#include <GL/glut.h>#include "meshloader.h"MeshLoader myScene;int * p;float * v;int main(int argc, char **argv){	p = myScene.getplist();	v = myScene.getvlist();	cout << p << ":";	cout << * p << ":";				glutInit(&argc, argv);	glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);	glutInitWindowPosition(300,100);	glutInitWindowSize(640,320);	glutCreateWindow("glutton");	glutDisplayFunc(render);	glutIdleFunc(render);	glutReshapeFunc(reshape);	glutMouseFunc(processMouse);	glutMotionFunc(processMouseActiveMotion);	glutPassiveMotionFunc(Motion);	glutEntryFunc(processMouseEntry);	glutKeyboardFunc(processNormalKeys);	glutSpecialFunc(processSpecialKeys);	glEnable(GL_DEPTH_TEST);	glutMainLoop();	return 0;}

Edited February 8, 2006 by BuffaloHELP (see edit history)

[switch 0]

alot of the time when i start having trouble with C++ i just seek out an alternate route of doing the same thing. When you are using pointers to reference arrays (we'll call ours myPointer), normally *myPointer just returns the first value in the array. On this note, you could try outputting myPointer[0], as that is equivalent to saying *(myPointer + 0).maybe change the declaration from vlist[] and plist[] to *vlist and *plist respectively and then changing their initialization to vlist = new float[100] and plist = new int[100]. That could help.apart from that, i must congratulate you on how neat your code looks. Good work. Nice and Easy to read. :rolleyes:ok good luck mate.