eclipse index 不工作 F3 不能找到头文件

To add paths containing code to parse, follow these steps :
1. Right click on the project
2. Select Properties
3. Go to C/C++ General
4. Go to Path and Symbols
5. If the paths are missing, add paths.

To re-parse the code follow these steps :
1. Right click on the project
2. Select Index
3. Rebuild