Exercise 5 draft

Added Exercise 5 but incomplete

Informatik_I/Exercise_5/Task_4/run_length.cpp

@@ -0,0 +1,63 @@
+#include "run_length.h"
+
+void encode() {
+  int i;
+  int c;
+  int count;
+  std::cin >> i;
+  std::cout << 1 << " ";
+  while (i != -1) {
+    count = 0;
+    c = i;
+    while (i == c && i >= 0 && i <= 255) {
+      ++count;
+      std::cin >> i;
+      if (count == 255) {
+        break;
+      }
+    }
+    if (i < -1 || i > 255) {
+      if (count == 0) {
+        std::cout << "error";
+        return;
+      } else {
+        std::cout << count << " ";
+        std::cout << c << " ";
+        std::cout << "error";
+        return;
+      }
+    }
+    std::cout << count << " ";
+    std::cout << c << " ";
+  }
+  std::cout << -1;
+}
+
+void decode() {
+  int i;
+  int count;
+  std::cin >> count;
+  std::cin >> i;
+  std::cout << 0 << " ";
+  while (count != -1) {
+    if (i < -1 || i > 255) {
+      std::cout << "error";
+      return;
+    }
+    if (count < -1 || count > 255) {
+      std::cout << "error";
+      return;
+    }
+    for (int j = 0; j < count; ++j) {
+      std::cout << i << " ";
+    }
+    std::cin >> count;
+    if (count != -1)
+      std::cin >> i;
+    if (i == -1) {
+      std::cout << "error";
+      return;
+    }
+  }
+  std::cout << -1;
+}