You're gonna have to give us a bit more than that - how about some source code?

hi,

this sounds like buffer overflow

as winbatch said 'give us your source code'.

fgets() to read a line of input.
strtol() to validate, convert and check for numeric overflow.

Both provide some success/fail indication in their status returns.

Absolutely right! Here the source code:

#include <iostream.h>
#include <limits.h>

main()
{
int n; /* number of values entered */
cout << "How many values? (1..10) -> ";
cin >> n;
cin.ignore(SHRT_MAX, '\n');

/* control number of value entered by the user */
while (n<1||n>10)
{
cout << "\nInvalid input. Try again (1..10) -> ";
cin >> n;
cin.ignore(SHRT_MAX, '\n');
}
}

Thus so far I have got the input will be within the range 1 to 10 and if the user will type in any value with a fraction part the program cut it off.

But if the user type in a letter the program crash!!!

If cin fails to read the type it expects, it will enter an error state and won't accept further input. Try this:
Also, you need to initialize n to something. If the first input fails, n will remain indeterminate, and that could cause a number of problems.

So if let's say I initialize n to 0 or 11. Will that be ok?

As long as it's something outside of your valid range, it doesn't matter what value you choose.

:eek: I didn't work!!!

>I didn't work!!!
Not helpful. Post the code that doesn't work and explain how it doesn't do what you want.