Given GPS co-ordinates(in degrees) of a person who needs a cab and co-ordinates of all the cabs in the city stored in a text file in JSON format, this program will find the user-id and name of all the cab drivers available in 50 km proximity.
- Compile the code using cmd:
g++ main.cpp. - After successful compilation, run it along with passing the file name
customers.json using cmd:
./a.out ./customers.json - A new file named result.json will be created on the same directory where the code and customers.json file is existing.
- Obtain latitude and longitude of each cab in string format along with their user-id and name from the JSON encoded input file.
- Convert latitude and longitude of the cab present in string format to double.
- Convert latitude and longitude of both, the user and the cab present in degrees to radians.
- Calculate distance between the user’s location and the cab using Great Circle Distance formula.
- If distance is found to be less than or equal to 50 kms then output the user- id and name of the cab driver to a new file else take no action.