решить систему с шагом. 2,28

/*  задание 2.28
    решить систему с шагом
    | (tan(x) + 5) / cos(x), x < 1
y = < sin(x) / (sqrt(cos(x)) + 1), (x >= 2) && (x <= 3)
    | (sin(x) / cos(x)) / (sqrt(x + 3)), x > 7
*/

#include <iostream>
#include <conio.h>
#include <stdio.h>
#include <cmath>
#include <iomanip>



using namespace std;


int main(){
    float r, Xnach, Xkon, Xd;
    bool flag1=false;
    bool flag2 = false;

    cout << "vvod Xnach=";
    cin >> Xnach;
    cout << "vvod Xkon=";
    cin >> Xkon;
    cout << "vvod Xd=";
    cin >> Xd;
    cout << "______________________" << endl;
    cout << "|   X   |      F     |" << endl;
    cout << "|_______|____________|" << endl;


    for (float x = Xnach; x <= Xkon; x += Xd){

        if (x < 1){
            if (cos(x) != 0)
                r = (tan(x) + 5) / cos(x);
        }
        else if (x < 2)
            flag1 = true;



        else if (x >= 2 && x <= 3){
            flag1 = false;
                if (cos(x) >= 0 && sqrt(cos(x)) + 1 != 0)
                r = sin(x) / (sqrt(cos(x)) + 1);
                else flag2 = true;
        }
        else if (x <= 7){
            flag1 = true;
            flag2 = false;
        }


        else if (x > 7){
            flag1 = false;
            if ((sqrt(x + 3)) != 0)
                    r = (sin(x) / cos(x)) / (sqrt(x + 3));
            else flag2 = true;
            }


            else continue;


            cout.width(10);

            if (flag1)
            printf_s("|%5.1f  | ne zadano  |\n", x);
            else if (flag2)
                printf_s("|%5.1f  |net rechenii|\n", x);
            else printf_s("|%5.1f  |  %6.1f    |\n", x, r);
            cout << "|_______|____________|" << endl;


        }




    _getch();
    return 0;

}