task8

ex3/seq/jacobi_oo_stl/vdop.cpp

@@ -0,0 +1,84 @@
+#include "vdop.h"
+#include <cassert>               // assert()
+#include <cmath>
+#include <iostream>
+#include <vector>
+using namespace std;
+
+
+void vddiv(vector<double> &x, vector<double> const &y,
+           vector<double> const &z)
+{
+    assert( x.size() == y.size() && y.size() == z.size() );
+    size_t n = x.size();
+
+    for (size_t k = 0; k < n; ++k)
+    {
+        x[k] = y[k] / z[k];
+    }
+    return;
+}
+
+//******************************************************************************
+
+void vdaxpy(std::vector<double> &x, std::vector<double> const &y,
+            double alpha, std::vector<double> const &z )
+{
+    assert( x.size() == y.size() && y.size() == z.size() );
+    size_t n = x.size();
+
+    for (size_t k = 0; k < n; ++k)
+    {
+        x[k] = y[k] + alpha * z[k];
+    }
+    return;
+}
+//******************************************************************************
+
+double dscapr(std::vector<double> const &x, std::vector<double> const &y)
+{
+    assert( x.size() == y.size());
+    size_t n = x.size();
+
+    double    s = 0.0;
+    for (size_t k = 0; k < n; ++k)
+    {
+        s += x[k] * y[k];
+    }
+
+    return s;
+}
+
+//******************************************************************************
+void DebugVector(vector<double> const &v)
+{
+    cout << "\nVector  (nnode = " << v.size() << ")\n";
+    for (size_t j = 0; j < v.size(); ++j)
+    {
+        cout.setf(ios::right, ios::adjustfield);
+        cout << v[j] << "   ";
+    }
+    cout << endl;
+
+    return;
+}
+//******************************************************************************
+bool CompareVectors(std::vector<double> const &x, int const n, double const y[], double const eps)
+{
+    bool bn = (static_cast<int>(x.size()) == n);
+    if (!bn)
+    {
+        cout << "#########   Error: " << "number of elements" << endl;
+    }
+    //bool bv = equal(x.cbegin(),x.cend(),y);
+    bool bv = equal(x.cbegin(), x.cend(), y,
+                    [eps](double a, double b) -> bool
+    { return std::abs(a - b) < eps * (1.0 + 0.5 * (std::abs(a) + std::abs(a))); }
+                   );
+    if (!bv)
+    {
+        assert(static_cast<int>(x.size()) == n);
+        cout << "#########   Error: " << "values" << endl;
+    }
+    return bn && bv;
+}