c++ questions

1. Using vectors or arrays, write a function named word_rev() that reverse any given word.

2. Write a program that will:

• Ask the user to enter a word.
• Save the entry as word_entered.
• Call word_rev on the entry
• Display the reversed entry (word_entered)

3. Write a function named prime() that determine whether or not a given number n (greater than

one) is prime. The algorithm:

• If n is even then n is not a prime number except n = 2
• For all odd numbers less or equal to the square root of n, if any of them divide n, then

n is not prime

4. Write a program that:

• Asks the user to enter an integer
• Saves the entry as var
• Calls the function prime() on the entry
• Displays whether or not the entry is prime

5. Write a function named eratos() that find all the prime number less than a given number, its

argument n

6. Write a program that:

• Asks the user to enter an integer
• Saves the entry as bound
• Passes bound onto eratos()
• Displays all the prime numbers less or equal to bound