#include <iostream>
#include <string>
#include <iomanip>

double fRand(double fMin, double fMax)
{
    double f = (double)rand() / RAND_MAX;
    return fMin + f * (fMax - fMin);
}

double CreateFunction (double x, int n){
 srand(time(NULL));
 double xx = 1, sum = 0, an = 0;
 for (int i = 0; i < n + 1; i++) {
    an = fRand(0, 5);
    std::cout << an << " * x ^ " << i;
    if (i < n) {
        std::cout << " + ";
    }
    sum += xx * an;
    xx *= x;
 }
 return sum;
}

int main()
{
    double res = CreateFunction(1, 10);
    std::cout <<  " = " << res;
}