C++ 中有关 srand 我这个为什么在 Dev-c++ 里面不能运行？ VC 就能运行？

#include<iostream>
#include<time.h>
using namespace std;//使用命名空间 std.

int main()
{

 srand(time(NULL));//将时钟数作为随机数种子


 int price,guess;

 price = rand() % 1000 + 1;//取余,获得1~1000的随机数


 cout << "please input the price:" << endl;

 

 do{

 

 cin >> guess;//记录玩家所输入数值
if(guess > price)
    cout << "The price is lower than your guess,please input the price again:" << endl;

 if(guess < price)
    cout << "The price is higher than your guess,please input the price again:" << endl;//给予玩家比较大小的提示
}

 while (guess != price);//循环结构


 cout << "The price you give is right.It cost " << price << "." <<endl;//获得正确答案
system("pause");

 return 0;

 
}