# 3. Libraries

- [3.1 Header Files](/c++/3.-libraries/3.1-header-files.md)
- [3.1.1 Header Files](/c++/3.-libraries/3.1-header-files/3.1.1-header-files.md)
- [3.1.2 Header File](/c++/3.-libraries/3.1-header-files/3.1.2-header-file.md)
- [3.1.3 Header and Implementation File](/c++/3.-libraries/3.1-header-files/3.1.3-header-and-implementation-file.md)
- [3.1.4 Safer Header](/c++/3.-libraries/3.1-header-files/3.1.4-safer-header.md)
- [3.2 Using Libraries](/c++/3.-libraries/3.2-using-libraries.md)
- [3.2.1 Using a Utilities Library](/c++/3.-libraries/3.2-using-libraries/3.2.1-using-a-utilities-library.md)
- [3.2.2 The Util Library](/c++/3.-libraries/3.2-using-libraries/3.2.2-the-util-library.md)