development of airline application

we want to develop project in c++ using code block software. i have attached problem file. the description of program is The Ballarat Airline Company (BAC) wants a simple program to process customer requests to fly from some origin city to some destination city: For each customer request, the program has to indicate whether a sequence of BAC flights exists from the origin city to the destination city, and, if such a sequence exists, the program prints it.