Features of this programm: 1) Division by zero isn't possible.

Calculator.cpp

#include <iostream> 
using namespace std;

int main()
{
	float fr, sc, result;
	char action1;

	cout << " Enter the first number: ";
	cin >> fr;
	cin.ignore();

	cout << "\n" << " To choose one of the action. It can be: \n";
	cout << " + (addition), - (subtraction), / (division) or * (multiplication).\n" << " Your choose: ";
	cin >> action1;

	cout << "\n" << " Enter the second number: ";
	cin >> sc;
	cin.ignore();

	switch (action1)
	{
	case '+':
	{
		result = fr + sc;
		cout << "\n" << " Result: " << result << endl<<endl;
		break;
	}

	case '-':
	{
		result = fr - sc;
		cout << "\n" << " Result: " << result << endl<<endl;
		break;
	}

	case '*':
	{
		result = fr * sc;
		cout << "\n" << " Result: " << result << endl<<endl;
		break;
	}

	case '/':
	{
		result = fr / sc;
		if (sc == 0)
			cout << "\n" << " Error. Devision by zero isn't possible. " << endl<<endl;
		else
			cout << "\n" << " Result: " << result << endl<<endl;
		break;
	}

		default:
		{
			cout << "\n" << " Error. Given character wasn't found" << endl<<endl;
		}
	}

	system("pause");
}