Exercise 3

Added Exercise 3 with solutions and README to Repository

Informatik_I/Exercise_3/Task_2/README.md

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+_This task is a mixed text/programming task. You need to update the content of loop.cpp according to the instruction provided in the file. For the code part, please check the autograder output._
+
+# Task
+
+Considering the snippet
+
+```cpp
+for (;;) {
+  int i1, i2;
+  std::cin >> i1 >> i2;
+  std::cout << i1 + i2 << "\n";
+  int again;
+  std::cout << "Again? (0/1)\n";
+  std::cin >> again;
+  if (again == 0) break;
+}
+```
+
+1. Describe what it computes.
+
+1. Decide which of the other two kind of loops would fit better than the one it is currently using, and describe why.
+
+1. Rewrite the snippet into the loop you specified in (2). This part is autograded. Note: print the control message "Again? (0/1)" using the same format used in the snippet.

Informatik_I/Exercise_3/Task_2/loop.cpp

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+#include "loop.h"
+#include <iostream>
+
+// Fill out the file with the required answers
+
+/*
+
+  Subtask 1: describe what the code snippet computes
+
+  It is a very simple calculator which adds up the 2 number which are inputed by
+  the user.
+
+*/
+
+/*
+
+  Subtask 2: decide which of the other two kind of loops would fit better, and
+  describe why.
+
+
+  A while loop would be sufficient for the task of this code snippet, since we
+  only have to check, if the user wants to use the calculator again or not.
+
+  Of course, as in the last task we could look at the edge case. We could also
+  add an if expression to elimnate the posibility to input other numbers other
+  than 0 and 1 for the again variable.
+
+*/
+
+/*
+  Subtask 3: update the function below by rewriting the snippet into the
+  loop you specified in (2).
+  Note: print the control message "Again? (0/1)" using the same format used
+  in the snippet.
+*/
+
+void loop() {
+
+  int again = 1;
+
+  while (again != 0) {
+    int i1, i2;
+    std::cin >> i1 >> i2;
+    std::cout << i1 + i2 << "\n";
+    std::cout << "Again? (0/1)\n";
+    std::cin >> again;
+  }
+}