實作C++亂數的使用
範例是用樂透彩，由電腦亂數取出每一組有6個數字(不重複)的序列並印出
#include <iostream>
#include <time.h>
using namespace std;
int main()
{
int a,n;
int Index = 0;
int Box[6];
bool Exist ;
srand(time(NULL));
cout << "Please input a number:";
cin >> n;
while(n > 0)
{
for(int i=0; i<6; i++)
{
a = rand()%49+1;
Exist = false;
for(int j=0; j<Index; j++)
{
if(Box[j] == a)
{
Exist = true;
break;
}
}
if(Exist == false)
{
Box[Index] = a;
Index++;
}
else
{
i--;
}
}
for(int i=0; i<6; i++)
{
if(Box[i] < 10)
{
cout << 0 << Box[i] << " ";
}
else
{
cout << Box[i] << " ";
}
}
cout << endl;
n--;
Index = 0;
}
system("PAUSE");
return 0;
}
