// All three programs are written here 
// A menu driven program which allows to use all programs at the same time
// Done be Rustam Zokirov (U1910049)
// Last change done in April 13, 2020

#include 
#include 
#include  // for getch()
#include  // library which allows to work with files
#include  // for using function setw()

using namespace std;

int main(); 

void F_First_Program() {

	// creating a text file one.txt
	ofstream out_one;
	out_one.open("one.txt");
	for (int i = 2; i