我有一个像
这样的字符串string s = "abc; abc bla bla ;;;;; bla bla";
我想用;替换第一个:以外的所有内容。我可以得到如下计数：
int t = s.Where(e => e.ToString() == ";").Count();
如果我s.Replace(';', ':'); ;所有:都替换为 int a, *p_a;//declaration of normal variable and int pointer variable
a = 56; //simply assign value
p_a = &a; //save address of "a" to pointer variable
*p_a = 15; //override the value of the variable
//print 0xfoo and 15
//- first is address, 2nd is value stored at this address (that is called dereference)
printf("pointer p_a is having value %d and targeting at variable value %d", p_a, *p_a);
。有人可以告诉我如何实现这一目标。
答案 0 :(得分：6)
有一点正则表达式：
string s = "abc; abc bla bla ;;;;; bla bla";
var regex = new Regex("(?<!^[^;]*);");
var result = regex.Replace(s,":");
Console.WriteLine(result);