Integral Perfect Square

Here is a C implementation of calculating integral square root.  Algorithm based on "long division" logic.  Test cases done with OpenMP and should be compiled as

g++ --std=c++0x -fopenmp -Wall IntegralPerfectSquare.cpp -o IntegralPerfectSquare

Reference:
http://www.math-only-math.com/square-root-of-a-perfect-square-by-using-the-long-division-method.html

Gihub:
https://github.com/kitsook/CPerfectSquare