package com.example.kiryav1.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    int num;
    TextView tv;


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

        num = 0;
        Button BAdd=(Button)findViewById(R.id.btnAdd);
        Button BSub=(Button)findViewById(R.id.btnSub);
        tv=(TextView)findViewById(R.id.txt) ;

        BAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                num+=1;
               tv.setText(String.valueOf(num));
            }
        });
        BSub.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {A
                num-=1;
                tv.setText(String.valueOf(num));
            }
        });
    }
}