Using C++

Create a FUNCTION that contains a switch statement that simulates a simple calculator.

Repeatedly call this function with a Do While loop, prompting for a new operator and integer, until the calculator returns 0, in which case the program will close.

I created the entire program without a function, but it became clear that my professor was seeking a function. I took a cop out, and essentially just made the entire program a function and called it once in another .cpp file, but, as i expected, that wasn't acceptable either.

I need help reformatting this so the calculator function is within the Do while loop, and then we're passing in the original data, and it continually updates the variables until it returns 0 and closes.

int calculatorO char op; double inl, in2; cout "Enter an operator, either +, -, *, / : "