When both the programs READER and TAG are compiled. READER should be run (as it contains the main) .IT communicates with the TAG and prompts for the vehicle information as shown in the following snapshot
If the Car is already checked in i.e if VehicleID is present in the vehicle info (slave) file then the car is not allowed to check in and the Gate does not open ,otherwise the gate opens and the Car check in time ,vehicleId and status is set in the slave file.
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