package com.example.cal049;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    Button but_add;
    Button but_sub;
    Button but_div;
    Button but_mul;
    EditText but_num1,but_num2;

    TextView res;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        but_add=(Button) findViewById(R.id.add);
        but_sub=(Button) findViewById(R.id.sub);
        but_div=(Button) findViewById(R.id.div);
        but_mul=(Button) findViewById(R.id.mul);

        but_num1=(EditText)  findViewById(R.id.num1);
        but_num2=(EditText)  findViewById(R.id.num2);

        res=(TextView) findViewById(R.id.result);

        but_add.setOnClickListener(this);
        but_sub.setOnClickListener(this);
        but_div.setOnClickListener(this);
        but_mul.setOnClickListener(this);


    }

    @Override
    public void onClick(View v) {
        double op1=Double.parseDouble(but_num1.getText().toString());
        double op2=Double.parseDouble(but_num2.getText().toString());
        double text_res = 0;

        if(v.equals(but_add))
            text_res=op1+op2;
        else if(v.equals(but_sub))
            text_res=op1-op2;
        else if(v.equals(but_div))
            text_res=op1/op2;
        else if(v.equals(but_mul))
            text_res=op1*op2;
        else
            text_res=0;
        res.setText(String.valueOf(text_res));

    }
}