随机数的产生

#include "iostream"
#include "time.h"
using namespace std;  
void main()
{ 
 int count=0; 
 srand((unsigned)time(NULL)); 
 for (int i=0;i <10;i++)
 { 
  count++; 
  cout << "No " <<count << "= " <<rand() << " "; 
  if (!(count%5))
   cout <<endl; 
 } 
}