C++ rastgele float değer atamak

#include "stdafx.h"
#include <iostream>
#include "time.h"
#include <stdlib.h>
using namespace std;
void main()
{
        cout << "Bakalim sayi'yi bulabilicekmisiniz:" << endl;
        cout << "Baslayalim :" << endl;
        cout << "Sayi virgul'lumu tam sayimi olsun:" << endl;
        cout << "Virgullu sayi 1 ile 2 arasinda" << endl << "Tam sayi ise 10 ile 100 arasinda" << endl;
        cout << "1 . Virgullu Sayi" << endl << "2 . Tam Sayi" << endl;
        cout << "1 veya 2 Sec :" << endl;
                    /*Kullanıcıyı Bilgilendir*/
                        int sayi,secenek,skor=0;
                        cin >> secenek;
                    /*Girdi al*/
                        int sunuc=0, can=5;
                    /**/
                        do {
                    /*Değişken 1*/
                        float sayi1;
                        srand(time(NULL));
                        sayi1 = 0;
                    /**/
                    /*Değişken 2*/
                        int    sayi2;
                        srand(time(NULL));
                        sayi2 = rand() % 100 + 10;
                    /**/
                        if (secenek == 1) {
                    /**/
                        cout << "Virgullu sayi tahmin etme oyunnuna hosgeldiniz" << endl;
                        cout << "Toplam Can :" << can << "\tKaldi" << endl;
                        cout << "Puan :" << skor << endl;
                    /**/
                        cout << "Tahmin:";
                        cout << sayi1 << endl; /*Hile :D*/
                        cin >> sayi;
                    /**/
                        if (sayi1 > sayi) {
                            cout << "Yanlis \t Biraz Arttir\t";
                            can--;
                        }
                        else if (sayi1 < sayi) {
                            cout << "Yanlis \t Biraz Eksilt\t";
                            can--;
                        }
                        else if (sayi1 == sayi) {
                            cout << "Doğru\t";
                            skor++;
                        }
                        else {
                            cout << "Hata";
                        }
                        }
                    /*--------------------------*/
                        else if (secenek == 2) {
                    /**/
                        cout << "Tam sayi tahmin etme oyunnuna hosgeldiniz" << endl;
                        cout << "Toplam Can :" << can << "\tKaldi" << endl;
                        cout << "Puan :" << skor << endl;
                    /**/
                        cout << "Tahmin:";
                        cout << sayi2 << endl; /*Hile :D*/
                        cin >> sayi2;
                    /**/
                        if (sayi2 > sayi) {
                            cout << "Yanlis \t Biraz Arttir\t";
                            can--;
                        }
                        else if (sayi2 < sayi) {
                            cout << "Yanlis \t Biraz Eksilt\t";
                            can--;
                        }
                        else if (sayi2 == sayi){
                            cout << "Doğru\t";
                            skor++;
                        }
                        else {
                            cout << "Hata";
                        }
                        }
                        else {
                            cout << "Hatalı Giris:";
                        }
                        } while (1 != (secenek == 1 || secenek == 2));
system("pause");
}

Run-Time Check Failure #3 - The variable 'sayi' is being used without being initialized.