public class HelloWorld{

? ? public static void main(String[] args) {

double score=80;

boolean a=score>=60;

boolean b=score<70;

boolean c=score>=70;

boolean d=score<80;

boolean e=score>=80;

boolean f=score<60;

String mark=((f==true)?"不合格":"");

String mark1=((a&&b==true)?"合格":"");

String mark2=(c&&d==true)?"良好":"";

String mark3=(e==true)?"優秀":"";

System.out.println("成績"+mark+mark1+mark2+mark3);

}

}