四则运算算法

package yunsuan;

 

import java.util.Random;

 

public class math {

public static void main(String[] args) {

    String[] operate=new String[]{"+","-","×","÷"};

      int[] numbers=new int[1000];

      for(int i=1;i<=1000;i++){

      numbers[i-1]=i;

    }

    Random r=new Random();

    for(int i=0;i<300;i++){

      System.out.println(numbers[r.nextInt(1000)]+operate[r.nextInt(4)]+numbers[r.nextInt(1000)]+"=");

    }

  }

  }