package com.example.simplecalculator12;

import androidx.appcompat.app.AppCompatActivity;


import android.annotation.SuppressLint;
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, but_Sub, but_Mul, but_Div;
    EditText txt_Num1, txt_Num2;
    TextView txt_Res;

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

        but_Add=(Button) findViewById(R.id.btnAdd);
        but_Sub=(Button) findViewById(R.id.btnSub);
        but_Mul=(Button) findViewById(R.id.btnMul);
        but_Div=(Button) findViewById(R.id.btnDiv);

        txt_Num1=(EditText) findViewById(R.id.txtNum1);
        txt_Num2=(EditText) findViewById(R.id.txtNum2);

        txt_Res=(TextView) findViewById(R.id.textView4);

        but_Add.setOnClickListener(this);
        but_Sub.setOnClickListener(this);
        but_Mul.setOnClickListener(this);
        but_Div.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
    double Op1=Double.parseDouble(txt_Num1.getText().toString());
    double Op2=Double.parseDouble(txt_Num2.getText().toString());
    double Res;

    if(v.equals(but_Add))
        Res=Op1+Op2;
    else if (v.equals(but_Sub))
        Res=Op1-Op2;
    else if (v.equals(but_Mul))
        Res=Op1*Op2;
    else if (v.equals(but_Div))
        Res=Op1/Op2;
    else
        Res=0;
    txt_Res.setText(String.valueOf(Res));
    }
}