floating point random number in c++

hi i am trying to write a code for random numbers between -1 and 1 like : 0.9 0.3 0.8 but i can get only numbers like 1 2 3 5 etc using this code

rand()%(max-min + 1) + min

is there any direct function in c++ .if not how can i achieve it

the complete programis :

#include<iostream>
#include<cstdlib>
#include<vector>
using namespace std;

class perceptron{
    public:
        vector <float> weights;
        int max=5,min=1;
        perceptron( float n){
            for( int i=0 ;i< n; i++){

                weights.push_back(rand()%(max-min + 1) + min);
                cout<<weights[i]<<",";
        }
    }
};
int main(){
    perceptron p1(4);
    return 0;
}