Complete load$\_$pts$\_$file function that reads multiple pairs of numbers from a file and finds the distance between every two numbers on a number line:

Few steps as the guidance

$1)$ Open$/$Read the $.$dat file into a pre$-$allocated given space, data$\_$buffer.

$2)$ The format is fixed in every single line of the file, parse the content

$$ and interpret each as an integer number.

$3)$ Finding distances from the every$-$two$-$number, iteratively store the distance to an integer array

$($note: the base address is given in $a$1).$

$4)$ Return the number of distances calculated.