package sds;
import java.util.Scanner;
public class Test {
static int Scanner ;
public static void main(String args[]) {
int a;
System.out.print("输入");
Scanner scan = new Scanner(System.in);
String read = scan.nextLine();
System.out.println("输入数据:"+read);
a=Scanner;
if(a>=90){
System.out.println("A");
}
else if(a>=60){
System.out.println("B");
}
else{
System.out.println("C");
}
}
} (求大神改正)