Writing vector data into a file!

[Member 9350237]

Hi Friends!, I'm a very beginner in c++, I have been working on a code to develop a tracking game using haptic device as a controller. I'm using a library called Chai3D and OpenGL for graphics. I want to make provision in my code to write certain objects in a vector to a .txt file. I'm including a section of my code where I've to save some objects into a file:

void updateHaptics(void)
{
// main haptic simulation loop
while(simulationRunning)
{
// for each device

        // read position of haptic devices 1,2
        cVector3d  newPosition1,newPosition2;
		 
		//hapticDevices\[i\]->getPosition(newPosition);
        hapticDevices\[0\]->getPosition(newPosition1);
		hapticDevices\[1\]->getPosition(newPosition2);

        // read orientation of haptic devices 1, 2
        cMatrix3d newRotation1, newRotation2;
        hapticDevices\[0\]->getRotation(newRotation1);
		hapticDevices\[1\]->getRotation(newRotation2);

        // update position and orientation of cursors
        cursors\[0\]->setPos(newPosition1);
		cursors\[1\]->setPos(newPosition2);
        cursors\[0\]->setRot(newRotation1);
		cursors\[1\]->setRot(newRotation2);

        // read linear velocity from devices 1,2
        cVector3d linearVelocity1, linearVelocity2;
        hapticDevices\[0\]->getLinearVelocity(linearVelocity1);
		hapticDevices\[1\]->getLinearVelocity(linearVelocity2);

        // update arrow for device 1
        velocityVectors\[0\]->m\_pointA = newPosition1;
        velocityVectors\[0\]->m\_pointB = cAdd(newPosition1, linearVelocity1);
		
		// update arrow for device 2
		velocityVectors\[1\]->m\_pointA = newPosition2;
        velocityVectors\[1\]->m\_pointB = cAdd(newPosition2, linearVelocity2);
		
		
		// Apply a coupled force F1= Kp (X1-X2)
		
		double Kp = 60.0; // \[N/m\]
		double Kb = 3.0; // \[N.s/m\]
		
		cVector3d newForce (0,0,0);
        cVector3d coupledForce1 = cMul(Kp, (newPosition1-newPosition2))-(cMul(Kb, (linearVelocity2)));
		newForce.add(coupledForce1);
		hapticDevices\[1\]->setForce(newForce);// send computed force to haptic device 1

	    
		cVector3d newForce1 (0,0,0);
		cVector3d coupledForce2 = cMul(Kp, (newPosition2-newPosition1))-(cMul(Kb, (linearVelocity1)));
		newForce1.add(coupledForce2);
		hapticDevices\[0\]->setForce(newForce1);// send computed force to haptic device 0
	
}

// exit haptics thread
simulationFinished = true;