四则运算作业

 

public class math { public static void main(String[] args) { String[] operate=new String[]{"+","-","×","÷"}; int[] numbers=new int[300]; for(int i=1;i<=300;i++){ numbers[i-1]=i; } Random r=new Random(); for(int i=0;i<300;i++){ System.out.println(numbers[r.nextInt(300)]+operate[r.nextInt(4)]+numbers[r.nextInt(300)]+"="); } } }