Reorder Sentence in C++

[culture]

Hello,
I have a problem in C++ that has been giving me a bit of problem.

I am suppose to write a program that allows a user to enter a sentence, and then ask for two positions from the user, and then switch around the sentence according to the positions entered.

If the user enters a negative number as a position to switch; the program should end.

If the user enters a number less than one, or greater than the number of words in the sentence, the following should print "Invalid position entered"
and ask for the first position again.

For example a user typed "The cat sat on mat the"
The program would look like this:

Enter the sentence: The cat sat on mat the

Enter first position: 5
Enter second position: 6

The cat sat on the mat

Please can someone assist me as soon as possible. Thank you

[r035198x]

What have you done so far?

[newb16]

I am suppose to write a program that allows a user to enter a sentence, and then ask for two positions from the user, and then switch around the sentence according to the positions entered.

if you enter m and n, should it reverse the whole [m,n] block or just swap m-th and n-th word? The dumbest way is
to tokenize the whole sentence, split into words, place words in vector<string>, and then recomposed in desired order.
Less dumb way is to leave [0..m] and [m, length] parts of string untouched.