IRCTC
IRCTC like Ticket Booking System developed in C++ using Qt framework
1) Data encryption algorithm is used for storing passwords of users and binary search algorithm is used for verifying username and password.
2) For querying trains between stations, system will show all the available trains on and in case no direct trains are available, it will display indirect trains calculated using graph algorithms.
3) System takes care of cycles within the graph efficiently.
4) Simple payment system is designed for payment of ticket and then displaying of ticket.
5) Data storage using files