Calculating 4thRoots without using any library functions.

This algorithm uses Newton's method to calculate 4th roots for real numbers. Then Google Tests run to check the result.

to compile, link:

$ gcc roots.c -c

$ g++ -std=c++11 -Wall testGo.cpp roots.o -lgtest -lgtest_main -lpthread -o ./gt

to run:

$ ./gt --gtest_repeat=100 > gogTest.log