Dateien nach „BSP_1_D“ hochladen

BSP_1_D/main.cpp

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+#include "bsp_1_d.h"
+#include <iostream>
+#include <math.h>
+// BSP 1_D
+using namespace std;
+
+int main()
+{
+    vector<int> nvec{100,500,1000,10000,100000,1000000,10000000,100000000}; // Vektor mit verschiedene n zum Testen
+    double exact = M_PI*M_PI/6;
+    for(size_t k = 0; k<nvec.size(); ++k)
+    {
+        vector<double> x;
+        for(int i = 0; i<nvec[k]; ++i)
+        {
+            x.push_back(1.0/(i+1));
+        }
+        double sum = scalar(x,x);
+        double sumkahan = Kahan_skalar(x,x);
+
+        cout << "n = " << nvec[k] << endl;
+        cout << "sum = " << sum << endl;
+        cout << "sumkahan = " << sumkahan << endl;
+        cout << "Differenz mit/ohne Kahan: " << abs(sum - sumkahan) << endl;
+        cout << "Differenz zu exakt fuer n to inf (mit/ohne Kahan): " << abs(exact - sum) << " / " << abs(exact - sumkahan) << endl << endl;
+    }
+    return 0;
+}