analog input C++

[brandon...@gmail.com]

hey all im trying to get the analog inputs working with C++ for a robot im building for a school project. i have to use C++ cause its a stipulation from the teacher. im running the stock angtrom linux kernel and here's what ive done/tried so far
echo cape-bone-iio > /sys/devices/bone_capemgr.*/slots
also ive put this in the  etc/properties file so that the file will automatically be loaded on boot and it seems to be working as i can still read the 2 different analog file directories through the terminal if i add this file through the media/BEAGLEBONE/unEc.txt (it might be uNec.txt)file all of the AIN ports in the helper.17 file disappear. i think it has something to do with the way the beaglebone loads the file on boot
cat /sys/bus/iio/devices/iio:device0#/in_voltage5_raw   //gives valu 0-4055
cat /sys/devices/ocp.2/helper.17/AIN5   //gives value 0-1499

at the moment im using eclipse running on a ubuntu laptop and ive implemented some basic c++ programs on the beaglebone black so i know that the configuration works.
but nomatter what i try i just cant seem to get the code im using to read the port correctly all i can get out of it how is a bunch of 0's
here's the code

// Name        : AINRead.cpp
// Copyright   : Your copyright notice
// Description : Hello World in C++, Ansi-style
//============================================================================

#include <iostream>
#include <stdio.h>
#include <unistd.h>

using namespace std;

  //uncomment which file path you wish to use

 

 // gives value in terminal from 0 - 4055

 //char *Remote = "/sys/bus/iio/devices/iio:device0#/in_voltage5_raw";

 

 //gives value in terminal from 0 - 1499

 //char *Remote = "/sys/devices/ocp.2/helper.17/AIN5";

      FILE * raw_volt;
      int iteration = 0;


int main() {
    //how its read in terminal
    //cat /sys/bus/iio/devices/iio:device0#/in_voltage5_raw   // gives value 0-4055
   //cat /sys/devices/ocp.2/helper.17/AIN5   //gives value 0-1499

 

     while(iteration < 1000) // how many times the loop runs
    {
    raw_volt = fopen(Remote, "r+"); // reads analog input and stores in variable raw_volt
    // on the off chance that the value stored in raw_volt is already string

    printf("raw_volt \n", raw_volt);

 

    char c[10]; //this segment should convert raw_volt to string
    sprintf(c,"%d",raw_volt);
    printf ("voltage in : %s \n", c);
    usleep(1000);

    iteration += 1;
    }
}
any help in deciphering what im doing wrong would be a big help also let me know if ive left any pertinent information out