#if 1

include <stdlib.h>
include <stdio.h>
include <time.h>
include <iostream>
include <fstream>
using namespace std;
int main()
{
    int nRandNumber[10];
    for (int idx = 0; idx < 10; ++idx)
    {
        nRandNumber[idx] = rand();//取隨機數范圍為integer 0 ~ RAND_MAX(32767)
        cout << nRandNumber[idx] << endl;
    }
    for (int idx = 0; idx < 10; ++idx)
    {
        nRandNumber[idx] = (double)rand() / (RAND_MAX + 1) * (125 - 35) + 35;//取數35到125之間
        cout << nRandNumber[idx] << endl;
    }
    cout << RAND_MAX << endl;//最大值是32767

//srand是一個隨機數種子產生函數，當參數為1時，所得到的隨機數序列一樣
//output : nRanNum1 : 41 nRanNum2 : 18467
//         nRanNum3 : 41 nRanNum4 : 18467
ofstream outFile("d:\out.txt");

srand(1);
int nRanNum1 = rand();
int nRanNum2 = rand();

cout << "nRanNum1 : " << nRanNum1 << " nRanNum2 : " << nRanNum2 << endl;

outFile << "nRanNum1 : " << nRanNum1 << " nRanNum2 : " << nRanNum2 << endl;
srand(1);
int nRanNum3 = rand();
int nRanNum4 = rand();
cout << "nRanNum3 : " << nRanNum3 << " nRanNum4 : " << nRanNum4 << endl;
outFile << "nRanNum3 : " << nRanNum3 << " nRanNum4 : " << nRanNum4 << endl;

system("pause");
return 1;


}
endif</pre>