Open Project:
Download Assignment folder and open Assignment.cbp with CodeBlocks.

Change Compiler setting:
This project is using -std=c++11, therefore you need to change your Compiler seeting. Go to Settings-> Compiler-> Compiler settings-> Compiler Flags-> Tick "Have g++ follow the C++11 ISO C++ language standard [-std=c++11]"-> Click OK

Source: (modified from)https://github.com/mcximing/hungarian-algorithm-cpp