Upload files to "ex1D_kahan_summation"

ex1D_kahan_summation/main.cpp

@@ -0,0 +1,33 @@
+#include "mylib.h"
+#include <cmath>
+#include <iostream>
+using namespace std;
+
+int main(int argc, char **argv)
+{
+    for(size_t i = 1; i < 8; ++i)
+    {
+        size_t n = pow(10,i);
+        vector<double> x(n);
+        for (size_t k = 0; k < n; ++k)
+            x[k] = 1.0/(k + 1);
+            
+
+        // compute scalar products
+        double sum_1 = scalar(x, x);
+        double sum_2 = Kahan_skalar(x, x);
+
+        // compute error
+        double err_1 = abs(sum_1 - pow(M_PI,2)/6);
+        double err_2 = abs(sum_2 - pow(M_PI,2)/6);
+
+        cout << "n = " << n << endl;
+        cout << "Normal scalar product: " << sum_1 << "\terror: " << err_1 << endl;
+        cout << "Kahan scalar product: " << sum_2 << "\terror: " << err_2 << endl;
+        cout << endl;
+    }
+    
+    
+
+    return 0;
+}