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Please help aboout Bounding Box Collision

nooblet001 (13)
Hello. This is my first post here in cplusplus.I'm desperately in need of help right now cause I don't know how to make collision. I'm doing a maze game with 3d walls and the box as the player. I just want to know what the easiest way of doing a collision system (Showing the codes would be better). I'm really new to programming so sorry if I sound a bit noobish. Any would be appreciated :)

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 #include <stdio.h>
#include <conio.h>
#include <cstdlib>
#include <glut.h>

void GameScene()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

{

glMaterialfv(GL_FRONT, GL_DIFFUSE, BrownD);
glMaterialfv(GL_FRONT, GL_AMBIENT, Brown);
//floor
glPushMatrix();
glTranslatef(7.5f,7.5f,0.0);
glScalef(15.0,15.0,1.0);
glColor3f(1.0,1.0,1.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//START FROM LEFT TO RIGHT

//////////////////////////////////////////////////////
//LEFT SIDE
////////////////////////////////////////////////////
glMaterialfv(GL_FRONT, GL_DIFFUSE, RedD);
glMaterialfv(GL_FRONT, GL_AMBIENT, Red);
//cube 1
glPushMatrix();
glTranslatef(0.5,8.0,1.0);
glScalef(1.0,2.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 2
glPushMatrix();
glTranslatef(1.5,12.0,1.0);
glScalef(1.0,2.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 3     -----------
glPushMatrix();
glTranslatef(2.5,8.5,1.0);
glScalef(1.0,13.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 4
glPushMatrix();
glTranslatef(4.0,10.5,1.0);
glScalef(2.0,1.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 5
glPushMatrix();
glTranslatef(4.0,2.5,1.0);
glScalef(2.0,1.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 6
glPushMatrix();
glTranslatef(5.5,10.0,1.0);
glScalef(1.0,6.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 7
glPushMatrix();
glTranslatef(5.5,3.5,1.0);
glScalef(1.0,3.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();
///////////////////////////////////////
//RIGHT SIDE
////////////////////////////////////////

//cube 8
glPushMatrix();
glTranslatef(8.5,12.0,1.0);
glScalef(1.0,6.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 9
glPushMatrix();
glTranslatef(13.0,14.0,1.0);
glScalef(4.0,2.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 10
glPushMatrix();
glTranslatef(13.0,10.0,1.0);
glScalef(4.0,2.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 11
glPushMatrix();
glTranslatef(10.5,6.0,1.0);
glScalef(5.0,2.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 12
glPushMatrix();
glTranslatef(10.5,2.5,1.0);
glScalef(5.0,1.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//cube 13
glPushMatrix();
glTranslatef(12.0,1.5,1.0);
glScalef(2.0,3.0,depth);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

/////////////////////////////////////
//END OF SCENE
////////////////////////////////////

//CHARACTER (WHITE BOX)
glMaterialfv(GL_FRONT, GL_DIFFUSE, WhiteD);
glMaterialfv(GL_FRONT, GL_AMBIENT, White);
glPushMatrix();
glTranslatef(charposx,charposy,1.0);
glScalef(1.0,1.0,1.0);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();

//GOAL OBJECT (PINK BOX)
glMaterialfv(GL_FRONT, GL_DIFFUSE, PinkD);
glMaterialfv(GL_FRONT, GL_AMBIENT, Pink);
glPushMatrix();
glTranslatef(1.5,14.5,1.0);
glScalef(1.0,1.0,1.0);
glColor3f(0.0,1.0,0.0);
glutSolidCube(1);
  glEnd();
glPopMatrix();


///////////////////////////////////
//COLLISION DETECTION
////////////////////////////////
float halfposx1 = charposx + 0.5;
float halfposx2 = charposx - 0.5;
//BOUNDARY
if (halfposx1 >16.0)
charposx -=0.5;
if (halfposx2 < -1.0)
charposx +=0.5;

if (charposy >15.0)
charposy -=0.5;
if (charposy < 0.0)
charposy +=0.5;

////////
//
if(charposx <=1)
{
	if(charposy <=9  && charposy >=7)
		charposy += 0.05;
	if(charposy >=7 && charposy <=9)
		charposy -= 0.05;
}
glutSwapBuffers();
}
}
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