I have a text file which has the following format..... 5655 2333

here the first field is source ip address then destination ip address then source port and destination port

there are many such entries..... i want to know how do i extract these fields using c program code....

it would be a great help... thanks in advance.......

You can parse the string looking for spaces using the function strtok.
Or you can do it in this way

commented: For giving helpful links and not just handing out code. +7