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import java.io.BufferedReader;
import java.io.FileReader;
public class ScoreRaw {
public static void main(String[] args) {
// 【错误点】:没有 try-catch,如果文件不存在会直接报错
// 【错误点】:没有定义 sum
int sum = 0;
int count = 0;
// 【错误点】:写法不严谨,资源未在 finally 中关闭,容易造成内存泄漏
BufferedReader br = new BufferedReader(new FileReader("scores.txt"));
String line;
while ((line = br.readLine()) != null) {
// 【错误点】:如果文件里有空行或文字,parseInt 会报错崩溃
sum += Integer.parseInt(line);
}
}
}