First Exercise

Informatik_I/Exercise_1/Task_1/README.md

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+# Task
+
+Let `a`, `b`, `c`, and `d` be variables of type `int`.
+
+- Which of the following character sequences are valid expressions in the sense that they are accepted by a C++ Compiler? Explain your answer.
+
+1. a = b = 5
+1. 1 = a
+1. ++a + b++
+1. a + b = c + d
+1. a = 2 b
+
+Assume that all the variables have been defined and correctly initialized and that all expressions are completely independent from each other.
+
+- For each of the expressions that you have identified as valid, decide whether the entire expression is an `lvalue` or an `rvalue`, and explain your decision.
+
+- Determine the values of the expressions that you have identified as valid and explain how these values are obtained.

Informatik_I/Exercise_1/Task_1/main.md

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+# Task 1
+
+---
+
+### Expression 1: `a = b = 5`
+
+The expression is valid and will be accepted by the CPP compiler. It will result with the l-values `a = 5` and `b = 5`. This is due to the fact the the `=` opperation is read from right to left so `b = 5` will run first and `a = b` afterwards.
+
+### Expression 2: `1 = a`
+
+The expression is invalid.
+
+### Expression 3: `++a + b++`
+
+The expression is valid and will be accepted by the CPP compiler. It will result in a r-value since the result is not assigned to a variable.
+
+### Expression 4: `a + b = c + d`
+
+The expression is invalid.
+
+### Expression 5: `a = 2 b`
+
+The expression is valid and will be accepted by the CPP compiler. It will result with the l-value `a = 2 b`. This is valid since a l-value can be a r-value.