restructure and add ipi texs

ws2019/ipi/uebungen/cpp_headers/Funktional-statisch.cc

@@ -0,0 +1,29 @@
+#include <iostream>
+using namespace std;
+
+class Inkrementierer {
+public:
+  Inkrementierer (int n) {inkrement = n;}
+  int operator() (int n) {return n+inkrement;}
+private:
+  int inkrement;
+};
+
+class Quadrat {
+public:
+  int operator() (int n) {return n*n;}
+} ;
+
+template<class T>
+void schleife (T& func) {
+  for (int i=1; i<10; i++)
+    cout << func(i) << " ";
+  cout << endl;
+}
+
+int main () {
+  Inkrementierer ink(10);
+  Quadrat quadrat;
+  schleife(ink);
+  schleife(quadrat);
+}