package TEST;

import java.io.IOException;
import java.util.Scanner;

/**
 * Created by Dheshan M (@D-codex) on 11/22/2015.
 */
public class ExperimentalCalc {
    public static String removePoint(String in){
        int l=in.length();
        char ch,ch1;
        for(int i=l-1;i>0;i--){
            ch=in.charAt(i);
            ch1=in.charAt(i-1);
            if((ch=='0')&&(ch1=='.')){
                in=in.substring(0,i-1);
                break;
            }
        }
        return(in);
    }
    public static double CalculatorMain (String input){
        String buffer;
        double numbuffer;
        int u=0;
        char buf;
        input=input.trim();
        int l=input.length();
        String buffRecursive;
        double num[]=new double[25];
        char func[]=new char[25];
        for(int i=0;i<l;i++){
            char chk=input.charAt(i);
            if(!Character.isDigit(chk)){
                if(chk=='('){
                    for(int j=i+1;i<l;j++){
                        char chk0=input.charAt(j);
                        if (chk0==')'){
                            buffRecursive=input.substring(i+1,j);
                            num[u] =CalculatorMain(buffRecursive);
                            func[u]=input.charAt(j+1);
                            input=input.substring(j+2);
                            u = u + 1;
                            l = input.length();
                            i = 0;
                            break;
                        }
                    }
                }
                else if(chk!='.') {
                    buffer = input.substring(0, i);
                    numbuffer = Double.parseDouble(buffer);
                    num[u] = numbuffer;
                    buf = input.charAt(i);
                    func[u] = buf;
                    input = input.substring(i + 1);
                    u = u + 1;
                    l = input.length();
                    i = 0;
                }
            }
        }
        numbuffer=Double.parseDouble(input);
        num[u]=numbuffer;
        for(int i=0;i<=u;i++){
            switch(func[i]){
                case '+':
                    num[i+1]=num[i]+num[i+1];
                    break;

                case '*':
                    num[i+1]=num[i]*num[i+1];
                    break;

                case '/':
                    num[i+1]=num[i]/num[i+1];
                    break;

                case '-':
                    num[i+1]=num[i]-num[i+1];
                    break;
            }
        }
        double ans=num[u];
        String output=String.valueOf(ans);
        output=removePoint(output);
        return(ans);
    }
    public static void main(String Args[])throws IOException {
        Scanner in=new Scanner(System.in);
        String input,output;
        double out;
        System.out.println("Enter you Mathematical Statement \n" +
                "[Don't Forget to type the proper Mathematical Symbols]\n" +
                "Enter the Equation   :");
        input=in.nextLine();
        out=CalculatorMain(input);
        output=removePoint(String.valueOf(out));
        System.out.println("RESULT   :"+output);
    }
}