perceptron implementation changed + perceptronLearningAlgorithm and tests

tests/perceptron_learning.cpp

@@ -0,0 +1,41 @@
+#include <NeuralNetwork/Learning/PerceptronLearning.h>
+
+#include <cassert>
+#include <iostream>
+
+int main() {
+	{	// XOR problem
+		NeuralNetwork::FeedForward::Perceptron n(2,1);
+
+		n.randomizeWeights();
+
+		NeuralNetwork::Learning::PerceptronLearning learn(n);
+
+		for(int i=0;i<10;i++) {
+			learn.teach({1,0},{1});
+			learn.teach({1,1},{1});
+			learn.teach({0,0},{0});
+			learn.teach({0,1},{1});
+		}
+
+		{
+			std::vector<float> ret =n.computeOutput({1,1});
+			assert(ret[0] > 0.9);
+		}
+
+		{
+			std::vector<float> ret =n.computeOutput({0,1});
+			assert(ret[0] > 0.9);
+		}
+
+		{
+			std::vector<float> ret =n.computeOutput({1,0});
+			assert(ret[0] > 0.9);
+		}
+
+		{
+			std::vector<float> ret =n.computeOutput({0,0});
+			assert(ret[0] < 0.1);
+		}
+	}
+}