二分法，字符串倒序

         

string

strOrder = "I am a boy" ;
int i;
string tmp;
string [] s;
s = strOrder.Split( new char []{ ' ' });
for (i = 0; i <= ( int )s.Length / 2; i++)
{
    tmp = s[i];
    s[i] = s[s.Length - i - 1];
    s[s.Length - i - 1] = tmp;
}