Add examples for different utilities

cpplinker/10_debug_linker/math_lib.hpp

@@ -0,0 +1,26 @@
+#pragma once
+
+namespace Math {
+
+    // Free functions — each becomes a mangled symbol, e.g.
+    //   Math::sqrt(double)  →  _ZN4Math4sqrtEd
+    //   Math::square(double) → _ZN4Math6squareEd
+    //   Math::cube(double)   → _ZN4Math4cubeEd
+    double sqrt(double x);
+    double square(double x);
+    double cube(double x);
+
+    // Class — member functions add even richer mangling
+    class Vector2D {
+    public:
+        double x, y;
+
+        Vector2D(double x, double y);
+
+        double    length() const;
+        Vector2D  add(const Vector2D& other) const;
+        Vector2D  scale(double factor) const;
+        double    dot(const Vector2D& other) const;
+    };
+
+} // namespace Math