xiaochengxu

Posted 2021-03-24 yrswby2016

public class One {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new FileReader("20190815\bw.txt"));
        String line = br.readLine();//只有一个数据，直接读取一次就可以了
        br.close();
        int count = Integer.parseInt(line);
        if(count == 3){
            System.out.println("本软件只能免费使用3次，欢迎您注册会员后继续使用");
        }else{
            System.out.println("欢迎使用本软件，第"+ ++count + "次使用免费");
        }
        BufferedWriter bw = new BufferedWriter(new FileWriter("20190815\bw.txt"));
        bw.write(48+count);
        bw.close();

    }
}