Programming help

Hi,

This is my first time posting to a 4Chan text board so i apologize if i seem a bit selfish asking for help in my first post but this is the only board that im confident has frequent users.

Here is my question:
For a homework assignment in C/C++ i need to have some code that will terminate the program if the user inputs a value outside of a preset range. Ive looked through the book and all the class notes i have and cant seem to find any reference on how to make that happen. I know someone here should be able to give me an idea on how to do this.

>>4
use for loops when you need to loop a known number of times. use while loops for when you need to loop an indefinite number of times

>>6
duplicate code? there isn't much duplication going on there only the get input sequence. I was using the Yourdon loop. Yourdon loop states:

get input
while(condition)
{
    do_stuff
    get input
}
The Yourdon loop is pretty useful such as its application in control break algorithms.

Alternatively, this should make you happy
do
{
    get input
    do_stuff
} while(input > lower_range and input < higher_range)
display error