string如何去掉从后面开始的指定字符，比如"00"?

[山的那边还是山~]

RT

[effective_person]

for example!

[太乙]

string.strstr()

[太乙]

[Quote=引用 2 楼 hqin6 的回复:]
string.strstr()
[/Quote]

汗~~~看错题目了~~！！

[xkyx_cn]

#include <iostream>
#include <string>

using namespace std;

int main()
{
	string str("abcde");

	int pos;
	if ( (pos = str.rfind("de")) != string::npos)
		str = str.substr(0, pos);

	cout << str << endl;

	return 0;
}

[太乙]

basic_string   substr(size_type   pos   =   0,   
          size_type   n   =   npos)   const;   
  The   member   function   returns   an   object   whose   controlled   sequence   is   a   copy   of   up   to   n   elements   of   the   controlled   sequence   beginning   at   position   pos.   
  



--------------------------------------- 
  void   main()   
  {   
	string   st="ifn",b;   
  	b=st.substr(0,2);   
  	cout<<b;   
  }   
	
output:
if

[山的那边还是山~]

Thanks!明白了！

[帅得不敢出门]

感觉还是用erase()
要不然就多了一份拷贝了.