0_0_32571223_15541\Main.java:1: 错误: 需要class, interface或enum
Scanner sc = new Scanner(System.in);
^
0_0_32571223_15541\Main.java:2: 错误: 需要class, interface或enum
float r = 0;
^
0_0_32571223_15541\Main.java:3: 错误: 需要class, interface或enum
System.out.println("请输入x1:");
^
0_0_32571223_15541\Main.java:4: 错误: 需要class, interface或enum
int x1= sc.nextInt();
^
0_0_32571223_15541\Main.java:5: 错误: 需要class, interface或enum
System.out.println("请输入x2:");
^
0_0_32571223_15541\Main.java:6: 错误: 需要class, interface或enum
int x2= sc.nextInt();
^
0_0_32571223_15541\Main.java:7: 错误: 需要class, interface或enum
System.out.println("请输入y1:");
^
0_0_32571223_15541\Main.java:8: 错误: 需要class, interface或enum
int y1= sc.nextInt();
^
0_0_32571223_15541\Main.java:9: 错误: 需要class, interface或enum
System.out.println("请输入y2:");
^
0_0_32571223_15541\Main.java:10: 错误: 需要class, interface或enum
int y2= sc.nextInt();
^
0_0_32571223_15541\Main.java:11: 错误: 需要class, interface或enum
r=(float) Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
^
0_0_32571223_15541\Main.java:15: 错误: 需要class, interface或enum
System.out.println(String.format("%.2f",r)); //String.format("%.2f",r) 保留两位小数
^
12 个错误
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