L1-037 A除以B (10 分)
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner s=new Scanner(System.in);
int a= s.nextInt();
int b=s.nextInt();
if(b==0) {
System.out.print(a+"/"+b+"=Error");
}else if(b>0) {
float sum=(float)a/b;
System.out.print(a+"/"+b+"="+String.format("%.2f", sum));
}else {
float sum=(float)a/b;
System.out.print(a+"/("+b+")="+String.format("%.2f", sum));
}
}
}