seriell

src/seriell.cpp

@@ -0,0 +1,66 @@
+#include <vector>
+#include <chrono>
+#include <iostream>
+
+// Funktion erzeugt zwei Matrizen A und B der Größe n x n mit Zufallswerten
+void generateRandomMatrices(int n,
+                            std::vector<std::vector<double>>& A,
+                            std::vector<std::vector<double>>& B,
+                            double min_val = 0.0,
+                            double max_val = 10.0)
+{
+    // Zufallsgenerator initialisieren
+    std::srand(static_cast<unsigned int>(std::time(nullptr)));
+
+    A.resize(n, std::vector<double>(n));
+    B.resize(n, std::vector<double>(n));
+
+    for (int i = 0; i < n; ++i)
+        for (int j = 0; j < n; ++j)
+        {
+            double r1 = static_cast<double>(std::rand()) / RAND_MAX; // 0..1
+            double r2 = static_cast<double>(std::rand()) / RAND_MAX; // 0..1
+            A[i][j] = min_val + r1 * (max_val - min_val);
+            B[i][j] = min_val + r2 * (max_val - min_val);
+        }
+}
+
+// Matrizenmultiplikation
+std::vector<std::vector<double>> matmul(const std::vector<std::vector<double>>& A,
+    const std::vector<std::vector<double>>& B)
+{
+    int n = A.size();
+    int m = B[0].size();
+    int p = B.size();
+
+    if (A[0].size() != B.size())
+        throw std::runtime_error("Matrixgrößen passen nicht.");
+
+    std::vector<std::vector<double>> C(n, std::vector<double>(m, 0.0));
+
+    for (int i = 0; i < n; ++i)
+        for (int j = 0; j < m; ++j)
+            for (int k = 0; k < p; ++k)
+                C[i][j] += A[i][k] * B[k][j];
+
+    return C;
+}
+
+int main()
+{
+    int N = 500; // z.B. 500x500
+    std::vector<std::vector<double>> A, B;
+
+    auto start = std::chrono::steady_clock::now();
+
+    generateRandomMatrices(N, A, B);
+    auto C_serial = matmul(A, B);
+
+    auto end = std::chrono::steady_clock::now();
+    std::chrono::duration<double> diff = end - start;
+    std::cout << "Took: " << diff.count() << "s\n";
+
+    return 0;
+}//
+// Created by Anke Bidlingmaier on 15.12.25.
+//