Вывести таблицу значений функции

#include <iostream>
#include <string>
#include <math.h>
 
using namespace std;
 
int main()
{
double t = 0;
double a = 3;
for(double i = -22; i < 22 ; i+=1.5)
{
   // t=sin(i)+pow(sin(cos(a*i)), 2);
   // cout << t << endl;
   // t=0;
   t+=sin(i)+pow(sin(cos(a*i)), 2);
}
cout << t << endl;
}

#include <iostream>
#include <cmath>
#include <iomanip>
 
int main()
{   
    const double left_val = -21.;
    const double right_val = 21.;
    const double step = 1.5;
    const uint32_t count_iterations = (right_val - left_val) / step + 1u;
    const double a = 3.;
    auto f = [a](double x)
    { return sin(x) + cos(2. * a * x); };
 
    std::cout << std::right;
    std::cout
        << std::setw(10u) << "X "
        << std::setw(15u) << "Y\n\n";
    for (uint32_t idx = 0u; idx < count_iterations; ++idx)
    {
        double x_now = left_val + idx * step;
        std::cout
            << std::setw(10u) << std::fixed << std::setprecision(2u) << x_now << " "
            << std::setw(15u) << std::fixed << std::setprecision(7u) << f(x_now) << "\n";
    }
    std::cout << std::left;
 
    system("pause");
    return 0;
}

auto f = [a](double x)
{ return sin(x) + cos(a * x) * cos(a * x); };