Add std math translation (#4)

* Map math functions to std equivalents

* Update src/converter/code_generator_fixed.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update src/converter/code_generator_fixed.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update src/converter/code_generator_fixed.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update documentation for math functions

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: openhands <openhands@all-hands.dev>

Author: 3 people

README.md

@@ -159,6 +159,7 @@ Currently, PyToC++ effectively handles:
 - **Method overriding** and polymorphism
 - **Constructor translation** with proper initialization
 
+- **Math function translation**: `math.sqrt`, `math.sin`, and `math.cos` are translated to their C++ `std` equivalents.
 More complex features are under development, including:
 - Exception handling
 - Standard library mapping

docs/conversion_patterns.md

@@ -305,6 +305,8 @@ with open("file.txt") as f:
 | Python | C++ |
 |--------|-----|
 | `math.sqrt(x)` | `std::sqrt(x)` |
+| `math.sin(x)` | `std::sin(x)` |
+| `math.cos(x)` | `std::cos(x)` |
 | `random.random()` | `std::uniform_real_distribution<double>(0.0, 1.0)(generator)` |
 | `len(container)` | `container.size()` |
 | `min(a, b)` | `std::min(a, b)` |