A typical seven-segment consists of 8 LEDs arranged in a pattern to display values. A seven-segment can be either of the two types, namely, Common Anode (CA) and Common Cathode (CC). For more details, refer Seven segments.
A single seven-segment requires a minimum of 7 data pins of controller to display different values. The connections of seven-segment with PIC18F4550 are shown in the adjoining circuit.
To display a numeric value, a particular data-byte is sent by the microcontroller. Refer seven segment interfacing with 8051. This data byte can either be calculated manually or by using Seven Segment Editor tool of mikroC IDE. (Also see Working with mikroC)