Why this code became infinite loop when entering floating number?

Program to take negative input This program works perfectly with int but when inputting float it become infinite loop. why ?

#include<iostream>
using namespace std;
int main(){

     int positive = 0;
     
     while(positive>=0){
          cout<<"Enter number"; cin>> positive;
          if (positive<0){
               cout<<"yes it is negative";
          }
     }
     
     return 0;
}