compare binary digit in Nios II

Hello, im new in altera Nios II, im doing a Plamprint Identification system based on NIOS II, in my part is using nios ii to comparing reference data and input data.

We are using a TRDB_D5M digital camera and DE1 board for doing this project. The camera will capture a first picture and store in to the DE1 SDRAM. and so on the second picture.

My friend will convert the two picture in to the binary digit and store in SDRAM or flash memory. i have to compare the the two binary digit to show is it same or not.

After I did the SOPC builder in Quartus II, and then go to Nios II.

Let said I had

ref.txt file in SDRAM/flash memory, the content inside is 0000 0000

input.txt file in SDRAM, the content inside is 1111 1111

How do i use c programming in Nios II to implement this comparing data ??

#include <stdio.h># include <unistd.h>
Int main()
{
    int ref;     //how do I call the file in the SDRAM or flash memory ??
    int input;
    While(1)
    {
        If ( ref != input )
        {
            Printf (“\n fail”);
        else
            Printf(“\n access “);
        }
    }
Return(0);
}