ENH: Improved error detection

src/Network/NeuralNetwork.cpp

@@ -5,6 +5,7 @@
  * @date 13.6.18 - 
  */
 
+#include <iostream>
 #include <boost/random/mersenne_twister.hpp>
 #include <boost/random/uniform_real_distribution.hpp>
 #include "NeuralNetwork.h"
@@ -368,19 +369,19 @@ void NeuralNetwork::set_weight_array(std::vector<double> *weight_ptr) {
 void NeuralNetwork::eval_single(std::vector<double> &input, std::vector<double> &output) {
     if(!this->in_out_determined && this->n_inputs * this->n_outputs <= 0){
 //        this->determine_inputs_outputs();
-        printf("Error: input and output neurons have not been specified\n");
-        return;
+        std::cerr << "Input and output neurons have not been specified\n" << std::endl;
+        exit(-sin1);
     }
 
 
     if(this->n_inputs != input.size()){
-        printf("Error, input size != Network input size\n");
-        return;
+        std::cerr << "Error, input size != Network input size\n" << std::endl;
+        exit(-1);
     }
 
     if(this->n_outputs != output.size()){
-        printf("Error, output size != Network output size\n");
-        return;
+        std::cerr << "Error, output size != Network output size\n" << std::endl;
+        exit(-1);
     }
 
     std::fill(output.begin(), output.end(), 0.0);