Priyanshu27:
For example, if I want to change from "This is Router 1!" to some different value let say some numeric value. Now, I want to update it by either incrementing it or changing into some random value using rand() function. So, what is the correct way of doing it?
You are still being too vague.
Give one or two examples of what the data might look like after you have changed it from This is Router 1!
And if you want help with a program problem please post the complete program.
...R