Unable to access GPIO pins

I have a BeagleBone Black board and I'm using the below-mentioned image file.
https://debian.beagleboard.org/images/bone-debian-10.3-iot-armhf-2020-04-06-4gb.img.xz

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I aim to operate GPIO pins of this board with the c programming language.

To do so, I've gone through this link: https://beagleboard.org/static/librobotcontrol/installation.html

And after following all the steps according to this link the result I achieved is the same as mentioned in the **checking functionality** step [the last step] of this document.

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Furthermore, I follow this document for c language setup:
https://github.com/beagleboard/librobotcontrol/blob/master/docs/src/project_template.dox

and run this source code:
https://beagleboard.org/static/librobotcontrol/rc_test_leds_8c-example.html

All these processes were completed without any error.

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Now I want to access the GPIO pins of the board. For that, I've prepared a basic code.

Let's take a pin **P8_10** / GPIO2[4] for an example. So for that my code will be:

_#include
#include
#include
#include
//#define WAIT_US 500000 // time to light each LED in microseconds
int main()
{
rc_gpio_init(2,4,GPIOHANDLE_REQUEST_OUTPUT); /* declare as output*/
rc_gpio_set_value(2,4,1); /* set high */
rc_gpio_cleanup(2,4);
    return 0;
}_

After executing this code I am not getting the expected output.

So have you any suggestions for me regarding this code.
Or is there any other way to do so?

Thank you.