By default Vircon32 uses the keyboard as the gamepad

• D-Pad: Arrow keys
• L/R Bumpers: 'Q' and 'W' keys
• Y/X Buttons: 'A' and 'S' keys
• B/A Buttons: 'Z' and 'X' keys

To use player inputs you need to include input.h

gamepad_direction provides a simple way to read and store player D-Pad inputs

//Initialize variables used to store player input
int xDirection;
int yDirection;

//The addressof operator is used because the gamepad_direction methods changes the value of its inputs
gamepad_direction(&xDirection, &yDirection);

The Vircon32 c compiler uses different syntax to gcc, and has more limitations placed on structures. For more information see the quick guide

//declare structure
struct exampleStructure
{
    int myVariable;
    int myValue;
};

//declare a variable of type exampleStructure
exampleStrucutre somethingUseful;

//assign values to each property of variable
somethingUseful.myVariable = -30;
somethingUseful.myValue = 99;