简单的题目, 就是练习if...else if...else...语句的题目, 水题:

import java.io.BufferedReader;import java.io.InputStreamReader;public class Main {    public static void main(String[] args) throws Exception{        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));        String[] str = br.readLine().split(" ");        int A = Integer.parseInt(str[0]);        int B = Integer.parseInt(str[1]);        if (B==0) {            System.out.print(A+"/"+B+"=Error");        } else if(B > 0) {            System.out.print(String.format(A + "/" + B + "=%.2f", (float)A/(float)B));        } else {            System.out.print(String.format(A + "/" + "(" + B + ")" + "=%.2f", (float)A/(float)B));        }    }}