how to calculate a parsed expression (new to programming)

figured it out. did it using RPN.

hmmm i inserted code in the opening post but its not there anymore ...?
anyway this is what i meant:
e.g.

main function(){
int ans = calculate ( "( 4 + 3 * 2) + -2 )" ); //returns 8
}

public static calculate (string expression){
?????????
return answer;
}

You Can Use RegEx to parse Any Kind of Data to work With

ie

if i want to Parse only number from mix data String+Number

Following Function Finds Integer Values From String Data 


public int Multiply(string Matchpattern,string str)
{
Regex rx = new Regex(Matchpattern);
Match m = s.Match(str);

int x = Convert.ToInt32(m);
return x*x;
}

Use this Function like

Multiply("[0-9]*","Sample text and Digit Data 12345");

Happy Coding :)