正则表达式问号的四种用法详解

string pattern1 = @"a.*c";  // greedy match 
Regex regex = new Regex(pattern1);
regex.Match("abcabc"); // return "abcabc"

string pattern1 = @"a.*";  // non-greedy match 
Regex regex = new Regex(pattern1);
regex.Match("abcabc"); // return "abc"

while(<>){
  if(/("Fred wants a $1\n" ;
  }
}