L2_T1_V10

#include <iostream>
#include <cmath>
using namespace std;
double UserFunction (double x)
{
    return fabs(sin(x * x + 3));
}
int main()
{
    const double TabStep = 0.2;
    double x;
    double sum = 0.0;
    for(x = 0; x < 1; x+= TabStep)
    {
        sum += UserFunction(x);
    }
    while( x < 2 )
    {
        sum += UserFunction(x);
        x+= TabStep;
    }
    do
    {
        sum += UserFunction(x);
        x+= TabStep;
    }
    while( x <= 3 );
    cout << "Sum is equals to: " << sum;
}