[Java] 纯文本查看 复制代码

public class Test11 {
	public static void main(String[] args) throws IOException{
		BufferedReader br =new BufferedReader(new FileReader("c.txt"));
		int i =Integer.parseInt(br.readLine());
		if(i>0){
		System.out.println("还有"+i--+"次机会");
		}else System.out.println("机会用完了");
		BufferedWriter bw = new BufferedWriter(new FileWriter("c.txt"));
		bw.write(String.valueOf(i));
		br.close();
		bw.close();

有的时候运行会跳到-1去，是为什么啊？

[Java] 纯文本查看 复制代码

public class Test11 {
	public static void main(String[] args) throws IOException{
		BufferedReader br =new BufferedReader(new FileReader("c.txt"));
		int i =Integer.parseInt(br.readLine());
		if(i>0){
		System.out.println("还有"+i--+"次机会");
		}else System.out.println("机会用完了");
		BufferedWriter bw = new BufferedWriter(new FileWriter("c.txt"));
		bw.write(String.valueOf(i));
		br.close();
		bw.close();

有的时候运行会跳到-1去，是为什么啊？