Made some changes

src/main.cpp

@@ -0,0 +1,24 @@
+#include "GeneralAlgorithm.hpp"
+#include <armadillo>
+#include <iostream>
+
+double f(double x) {
+    return 100. * std::exp(-10.*x);
+}
+
+double a_sol(double x) {
+    return 1. - (1. - std::exp(-10)) * x - std::exp(-10*x);
+}
+
+int main() {
+    arma::mat A = arma::eye(3,3);
+
+    GeneralAlgorithm ga(3, &A, f, a_sol, 0., 1.);
+
+    ga.solve();
+    std::cout << "Time: " << ga.time(5) << std::endl;
+    ga.error();
+
+    return 0;
+
+}

src/simpleFile.cpp

@@ -1,10 +1,13 @@
 #include <armadillo>
 #include <cmath>
+#include <ctime>
 #include <fstream>
 #include <iomanip>
 #include <ios>
 #include <string>
 
+#define TIMING_ITERATIONS 5
+
 arma::vec* general_algorithm(
     arma::vec* sub_diag,
     arma::vec* main_diag,
@@ -37,7 +40,7 @@ arma::vec* special_algorithm(
     arma::vec* g_vec
 )
 {
-
+    return g_vec;
 }
 
 void error(
@@ -66,7 +69,7 @@ void error(
 
 }
 
-double analytic_solution(double x) {
+double f(double x) {
     return 100*std::exp(-10*x);
 }
 
@@ -90,23 +93,55 @@ void build_array(
 
     double step_size = 1./ (double) n_steps;
     for (int i=0; i < n_steps-1; i++) {
-        (*g_vec)(i) = analytic_solution((i+1)*step_size);
+        (*g_vec)(i) = f((i+1)*step_size);
     }
 
 }
 
+void timing() {
+    arma::vec sub_diag, main_diag, sup_diag, g_vec;
+    int n_steps;
+
+    std::ofstream ofile;
+    ofile.open("timing.txt");
+
+    // Timing
+    for (int i=1; i <= 8; i++) {
+        n_steps = std::pow(10, i);
+        clock_t g_1, g_2, s_1, s_2;
+        double g_res = 0, s_res = 0;
+      
+        for (int j=0; j < TIMING_ITERATIONS; j++) {
+            build_array(n_steps, &sub_diag, &main_diag, &sup_diag, &g_vec);
+
+            g_1 = clock();
+
+            general_algorithm(&sub_diag, &main_diag, &sup_diag, &g_vec);
+
+            g_2 = clock();
+
+            g_res += (double) (g_2 - g_1) / CLOCKS_PER_SEC;
+            build_array(n_steps, &sub_diag, &main_diag, &sup_diag, &g_vec);
+
+            s_1 = clock();
+
+            special_algorithm(-1., 2., -1., &g_vec);
+
+            s_2 = clock();
+
+            s_res += (double) (s_2 - s_1) / CLOCKS_PER_SEC;
+
+        }
+        ofile 
+            << n_steps << ","
+            << g_res / (double) TIMING_ITERATIONS << ","
+            << s_res / (double) TIMING_ITERATIONS << std::endl;
+    }
+
+    ofile.close();
+}
+
 int main() 
 {
-
-    arma::vec sub_diag, main_diag, sup_diag, g_vec;
-    int n_steps;
-    // Timing
-    for (int i=1; i <= 6; i++) {
-        n_steps = std::pow(10, i);
-      
-
-        // construct arrays
-
-    }
-
+    timing();
 }