lab 1 / TYPES

#include <iostream>
#include <cmath>

using namespace std;

union data_double
{
	double data;
	char mas[64];
};

void print_mas(char mas[], int size)
{
	int i;
	for (i = 0; i < size; i++)
	{
		cout << mas[i];
	}
	cout << endl;
}

void zero_mas(char mas[], int size)
{
	int i;
	for (i = 0; i < size; i++)
	{
		mas[i] = '0';
	}
}

void output_unsigned_char(unsigned char value, char mas[])
{
	int i, d, j = 0;
	for (i = 7; i >= 0; i--) {
		d = ((value >> i) & 1);
		if (d == 0) {
			cout << '0';
			mas[j] = '0';
		}
		else if (d == 1) {
			cout << '1';
			mas[j] = '1';
		}
		j++;
	}
	cout << endl;
}

void output_double(data_double Doub, char mas[])
{
	int i, j, k = 0;
	for (i = sizeof(double) - 1; i >= 0; i--)
	{
		unsigned char mask = 128;
		for (j = 0; j < sizeof(double); j++)
		{
			if (Doub.mas[i] & mask)
			{
				cout << '1';
				mas[k] = '1';
				k++;
			}
			else
			{
				cout << '0';
				mas[k] = '0';
				k++;
			}
			mask >>= 1;
		}
	}
	cout << endl;
}

void make_shift(char mas[], int digit, int num, char nmas[], int size) {
	for (int i = 0; i < size; i++) {
		nmas[i] = mas[i];
	}
	for (int i = digit - num ; i <= digit-1; i++) {
		if (i != size - 1) {
			if (mas[i] == '1') {
				nmas[i + 1] = '1';
			}
		}
		else break;
	}
	for (int i = digit - 1; i >= digit - num; i--) {
		if (i != 0) {
			if (mas[i] == '0') {
				nmas[i - 1] = '0';
			}
		}
		else break;
	}
}

unsigned char make_unsigned_char(char mas[]) {
	unsigned char num = '0';
	num >>= 6;
	int k = 0;
	for (int i = 7; i > 0; i--) {
		if (mas[i] == '1') num += pow(2, k);
		k++;
	}
	return num;
}

double make_double(char bits[]){
	int i, j = 10, exp = 0;
	char sign = 0;
	double temp = 0, IsxDouble = 0;
	double FloatPart;
	sign = bits[0];
	for (i = 1; i < 12; i++) {
		temp = pow(2, j);
		if (bits[i] == '1')
		{
			exp = exp + temp;
		}
		j--;
	}
	exp = exp - 1023;
	
	FloatPart = 0;
	FloatPart = pow(2, exp);
	j = exp - 1;
	for (i = 12; i < 64; i++)
	{
		temp = pow(2, j);
		if (bits[i] == '1')
		{
			FloatPart = FloatPart + temp;
		}
		j--;
	}
	IsxDouble = FloatPart;
	if (exp == -1023) {
		IsxDouble = 0;
	}
	if (sign == '1') {
		IsxDouble = IsxDouble * -1;
	}
	return IsxDouble;
}

int main() {
	char dmas[64], ucmas[8];
	char new_dmas[64], new_ucmas[8];
	zero_mas(new_dmas, 64);
	zero_mas(new_ucmas, 8);
	unsigned char charnum, new_charnum;
	double new_doubnum;
	int type, hdigit, nbits;

	cout << "Please, chose type of input" << endl;
	cout << "1: unsigned char" << '\n' << "2: double" << endl;
	cin >> type;

	if (type == 1) {
		cout << "Please write a unsigned char number" << endl;
		cin >> charnum;
		
		output_unsigned_char(charnum, ucmas);
		
		while (true) {
			cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
			cout << "Enter the number of the highest digit and the number of bits to make the shift\n";
			cout << "\nHighest digit (from 1 to 8): ";
			cin >> hdigit;
			
			cout << "\nNumber of bits (from 1 to 8): ";
			cin >> nbits;
			
			cout << endl;
			if (hdigit >= nbits) break;
			else {
				cout << "The number of bits must not exceed the number of the highest digit\n";
			}
		}
		make_shift(ucmas, hdigit, nbits, new_ucmas, 8);
		print_mas(new_ucmas, 8);
		new_charnum = make_unsigned_char(new_ucmas);
		cout << new_charnum;
	}

	else if (type == 2)
	{
		data_double doublenum;
		cout << "Please, write a double number" << endl;
		cin >> doublenum.data;
		
		output_double(doublenum, dmas);

		while (true) {
			cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
			cout << "Enter the number of the highest digit and the number of bits to make the shift\n"
				<< "\nHighest digit (from 1 to 64): ";
			cin >> hdigit;
			cout << "\nNumber of bits (from 1 to 64): ";
			cin >> nbits;
			cout << endl;
			if (hdigit >= nbits) break;
			else {
				cout << "The number of bits must not exceed the number of the highest digit\n";
			}
		}
		make_shift(dmas, hdigit, nbits, new_dmas, 64);
		print_mas(new_dmas, 64);
		new_doubnum = make_double(new_dmas);
		cout << new_doubnum;
	}
	return 0;
}