C++ - Parsing an input

Question

I'm approaching the "Calculate the distance" assignment.
Problem is: given in a row coordinates of two points, in the form:

(x1,y1) (x2,y2)

extract in four integer variables x1, y1, x2, y2. Pattern is: points are enclosed in parentheses, they're separed by a comma, there's one or more spaces between parentheses, there can be or not a space before y1 and y2, all four integers x1, y1, x2, y2 can be positive or negative.
What is the quickest way to extract x1, y1, x2, y2?

Answer 1

if they are saved as strings, what i would do (some sort of pseudocode):
use a variable to store both
values in a string separated by
a space (lets say var)
while (not the end of string)
if ( "(" || ")" )
increment
if ( "," || whitespace)
append space to var
increment
var += character
increment
another while to store info from string var into other variables in the format that you need.
don't know if it easy, it is how i would approach it.