While Loops

for some reason, the while loop is preventing the player from playing the game. it compiles correctly.

Code:

#include <iostream.h>
#include <string>
int main()
{
    float rnd;
    float guess;
    rnd = rand(20);
    cout << "Welcome to the number game!" << endl;
    cin.get();
    cout << "Enter a number between 1 and 20" << endl;
    int tries = 5;
    while(tries >= 1);
    {
    cin >> guess;
    if(guess < rnd)
    {
    cout << "Too low" << endl;
    tries -= 1;
    }
    if(guess > rnd)
    {
    cout << "Too high" << endl;
    tries -= 1;
    }
    if(guess == rnd)
    {
    cout << "You got it right!" << endl;
    }
    }
    return 0;
    }

>>while (tries >= 1);
What's that semi-colon for ?

AAAHHHH!!!STUPID ME!!!!!!!!