How can I add the calculation of degrees, percentages ... to the program code?

Question

C++ / C#

Hello. How can I add to the calculator the calculation of powers, percentages, arithmetic mean and some other functions in which it will be possible to select numbers manually? How can I clear the console of extra text? How can I make the program start again after each calculation? Thank you!

spoiler

пытаюсь понять программирование меньше недели так что извиняйте за такой возможно глупый вопрос

#include "pch.h"
#include <iostream>
#include <math.h>
#include <cstdlib>
#include <string>

using namespace std;

int main()
{
  float a, b, c;
  char x;
  cout << "Calculator v0.1\n";
  cout << "\n";
  cout << "Write a symbol(+, -, *, /): ";
  cin >> x;
  cout << "Write a first number: ";
  cin >> a;
  cout << "Write a second number: ";
  cin >> b;
  if (x == '+')
  {
    c = a + b;
    cout << "\n";
    cout << "Answer: " << a << '+' << b << '=' << c << endl;
  }
  if (x == '-')
  {
    c = a - b;
    cout << "\n";
    cout << "Answer: " << a << '-' << b << '=' << c << endl;
  }
  if (x == '*')
  {
    c = a * b;
    cout << "\n";
    cout << "Answer: " << a << '*' << b << '=' << c << endl;
  }
  if (x == '/')
  {
    c = a / b;
    cout << "\n";
    cout << "Answer: " << a << '/' << b << '=' << c << endl;
  }
  cout << "                         \n";
  return 0;
}

Answer 1

Clearing depends on the terminal. Usually on linux this is clear. In powershell, too, like A operations, also introduce new operation icons like ^ for degree or % for percentages, m for average, etc. For the average, right in case 'm': you can add additional values.