#include <iostream>
#include <math.h>
#include <iomanip>
#include <vector>
using namespace std;

char cornerLeftTop = 201;
char cornerRightTop = 187;
char cornerLeftBottom = 200;
char cornerRightBottom = 188;
char verticalLine = 186;
char horizontalLine = 205;
string titleOne = " Function #1 ";
string titleTwo = " Function #2 ";
string titleThree = " Function #3 ";


void printTitle(string titleName) {
	char title = 177;
	for (int i = 0; i < 30; i++) {
		cout << title;
	}
	cout << titleName;
	for (int i = 0; i < 30; i++) {
		cout << title;
	}
	cout << endl;
}

void topTable() {
	cout << cornerLeftTop;

	for (int i = 0; i < 71; i++) {
		cout << horizontalLine;
	}

	cout << cornerRightTop << endl;
}

void bottomTable() {
	cout << cornerLeftBottom;

	for (int i = 0; i < 71; i++) {
		cout << horizontalLine;
	}

	cout << cornerRightBottom << "\n\n";
}

void FuncHorizontalLine() {
	cout << verticalLine;
	for (int i = 0; i < 71; i++) {
		cout << horizontalLine;
	}
	cout << verticalLine << endl;
}

void funcOne(vector<float> vec) {
    printTitle(titleOne);
	topTable();
	cout << verticalLine << setw(18) << "X" << setw(18) << verticalLine << setw(18) << "SIN(X)" << setw(18) << verticalLine << endl;

	FuncHorizontalLine();

	for (float i = 0; i < 21; i++) {
		cout << verticalLine << setw(18) << vec[i] << setw(18) << verticalLine << setw(18) << sin(vec[i]) << setw(18) << verticalLine << endl;
	}

	bottomTable();
}

void funcTwo(vector<float> vec) {
    printTitle(titleTwo);
	topTable();
	cout << verticalLine << setw(18) << "X" << setw(18) << verticalLine << setw(18) << "2X - 4X + 9" << setw(18) << verticalLine << endl;

	FuncHorizontalLine();

	for (float i = 0; i < 21; i++) {
		cout << verticalLine << setw(18) << vec[i] << setw(18) << verticalLine << setw(18) << (2 * vec[i]) - (4 * vec[i]) + 9 << setw(18) << verticalLine << endl;
	}

	bottomTable();
}

void funcThree(vector<float> vec) {
    printTitle(titleThree);
	topTable();
	cout << verticalLine << setw(18) << "X" << setw(18) << verticalLine << setw(18) << "X^2 - 16X + 4" << setw(18) << verticalLine << endl;

	FuncHorizontalLine();

	for (float i = 0; i < 21; i++) {
		cout << verticalLine << setw(18) << vec[i] << setw(18) << verticalLine << setw(18) << pow(vec[i], 2) - (16 * vec[i]) + 4 << setw(18) << verticalLine << endl;
	}

	bottomTable();
}

int main()
{

	/* float *arrayX = new float [n];

	  for (float i = 0; i < n; i += 0.5){
		  elX = i + 0.5;

		  arrayX[i] = elX;
	  }*/

	/*
	for (int i = 0; i < n; i++){
		cout << arrayX[i];
	}*/
	vector<float> myVector(21);
	float elemK = 0;
	for (float k = 0; k < 21; k++) {
		k != 0 ? elemK += 0.5 : elemK == 0;
		myVector[k] = elemK;
	}

	funcOne(myVector);

	funcTwo(myVector);

	funcThree(myVector);

	return 0;
}