/tmp/compiler_72lm50sp/Main.java:5: 错误: 类Problem是公共的, 应在名为 Problem.java 的文件中声明
public class Problem {
^
1 个错误
package chapter01;
import java.util.Scanner;
public class Problem {
public static void main(String[] args) {
Scanner cin = new Scanner(System.in);
int a = cin.nextInt();
int b = cin.nextInt();
System.out.println(a+b);
}
}