本文实例讲述了c#生成随机数功能。分享给大家供大家参考，具体如下：
using system;
using system.collections.generic;
using system.linq;
using system.text;
namespace csharp
{
class program
{
static void main( string [] args)
{
console.writeline( "生成随机数\n" );
int randcount = 9; //随机数发的个数
int randmin = 1; //随机数最小值
int randmax = 21; //随机数最大值
int randindex, flag, temp;
randindex = temp = flag = 0;
random rand = new random();
int [] randarr = new int [randcount];
randarr[0] = rand.next(randmin, randmax);
while ( true )
{
flag = 0;
temp = rand.next(randmin, randmax);
for ( int i = 0; i <= randindex; i++)
{
if (temp == randarr[i])
{
flag = 1;
break ;
}
}
if (flag == 1) //如果 flag == 1 则有重复的数字生成。
{
continue ;
}
else if (flag == 0)
{
randindex++;
randarr[randindex] = temp;
}
if (randindex >= randcount - 1) //如果达到 randcount 退出循环
{
break ;
}
}
for ( int i = 0; i < randcount; i++)
{
console.writeline( "arr[" + i + "]=" + randarr[i]);
}
console.writeline( "\n任意键退出。" );
console.readline();
}
}
}
生成无重复的随机数
运行结果如下：
希望本文所述对大家c#程序设计有所帮助。
dy("nrwz");