This repository contains an implementation of Dijkstra's algorithm in C++. Dijkstra's algorithm is a widely used algorithm for finding the shortest paths between nodes in a graph, which may represent, for example, road networks.
src/
: Contains the C++ source code for the Dijkstra's algorithm implementation.README.md
: This README file providing an overview of the project.
To use the Dijkstra's algorithm implementation, follow these steps:
-
Clone the repository to your local machine.
-
Navigate to the
src/
directory. -
Compile the C++ source code using a C++ compiler (e.g., g++):
g++ dijkstra.cpp -o dijkstra
-
Run the executable with the input graph file as a command-line argument:
./dijkstra input_graph.txt
Replace
input_graph.txt
with the path to your input graph file. The input graph file should be in a specific format (e.g., adjacency list or adjacency matrix) as expected by the program.
The input graph file should contain the graph representation in a specific format. For example, if using an adjacency list representation, each line in the file may represent a node followed by its adjacent nodes and corresponding edge weights.
Example input graph file format:
1 2:10 3:5
2 4:3
3 2:2 4:9
4 5:2
5
This represents a graph with nodes 1 to 5 and their adjacent nodes with corresponding edge weights.
- The program reads the input graph from a file and constructs a graph data structure.
- It applies Dijkstra's algorithm to find the shortest paths from a specified source node to all other nodes in the graph.
- The implementation may include optimizations or variations of Dijkstra's algorithm, depending on specific requirements or constraints.
- This implementation provides a basic version of Dijkstra's algorithm. Depending on the application, you may need to customize or extend it to handle specific edge cases or requirements.
- Ensure that the input graph file follows the expected format for proper execution of the program.
This repository contains a solution for finding journeys in a bus network based on General Transit Feed Specification (GTFS) data. The program takes two command-line inputs: the source stop ID and the destination stop ID, and prints all possible direct journeys and journeys with one transfer between the specified stops.
src/
: Contains the C++ source code for the solution.data/
: Contains sample GTFS data files used for testing.README.md
: This README file providing an overview of the project.
To run the program, follow these steps:
-
Clone the repository to your local machine.
-
Navigate to the
src/
directory. -
Compile the C++ source code using a C++ compiler (e.g., g++):
g++ main.cpp -o bus_journey_finder
-
Run the executable with the source and destination stop IDs as command-line arguments:
./bus_journey_finder source_stop_id destination_stop_id
Replace
source_stop_id
anddestination_stop_id
with the actual stop IDs you want to find journeys between.
The data/
directory contains sample GTFS data files (stops.txt
and routes.txt
) used for testing the program. You can replace these files with your own GTFS data files if needed.
- The program parses GTFS data to construct a graph representing the bus network, where stops are nodes and routes are edges connecting them.
- It uses graph traversal algorithms to find direct journeys and journeys with one transfer between the specified stops.
- This solution provides basic functionality for finding journeys with direct routes and one transfer. You can extend it to handle journeys with two transfers by implementing similar logic.
- The GTFS data used in this solution is simplified for demonstration purposes. In a real-world scenario, you may need to adapt the parsing logic to handle more complex data structures.