Adding exam part 1/4

Exam/part1/TStack.cpp

@@ -0,0 +1,36 @@
+#include "TStack.h"
+#include <stdexcept>
+
+void TStack::Push(const TAction& action)
+{
+    if (top >= STACK_MAX_SIZE)
+        throw std::overflow_error("Stack overflow");
+    event[top++] = action;
+}
+
+TStack::TAction TStack::Pop()
+{
+    if (top == 0)
+        throw std::underflow_error("Stack empty");
+    return event[--top];
+}
+
+TStack::TAction TStack::Peek() const
+{
+    if (top == 0)
+        throw std::underflow_error("Stack empty");
+    return event[top - 1];
+}
+
+bool TStack::IsEmpty() const
+{
+    return top == 0;
+}
+
+void TStack::Clear()
+{
+    for (int i = 0; i < top; i++) {
+        this->Pop();
+    }
+}
+