It works!!!!!!

mandelbrot.cpp

@@ -0,0 +1,28 @@
+#include "include/mandelbrot.hpp"
+#include "include/constants.hpp"
+
+int calculateMandelbrot(double cReal, double cImag) {
+  double zImag{0};
+  double zReal{0};
+  double zImagNeu{};
+  double zRealNeu{};
+  double zImagSquared{};
+  double zRealSquared{};
+  int iterations{};
+
+  for (; iterations <= Constants::maxIterations; ++iterations) {
+    zRealSquared = (zReal * zReal);
+    zImagSquared = (zImag * zImag);
+
+    zRealNeu = zRealSquared - zImagSquared + cReal;
+    zImagNeu = 2 * zReal * zImag + cImag;
+
+    zReal = zRealNeu;
+    zImag = zImagNeu;
+
+    if (zRealSquared + zImagSquared > 4) {
+      break;
+    }
+  }
+  return iterations;
+}