本文介绍了getline的实现(istream& is,string& str)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我的问题很简单,如何实现getline(istream,string)?
如何解决具有固定大小的char数组(如getline(char * s,streamsize n))的问题?
他们在使用临时缓冲区并多次调用新char [length]或其他整洁的结构吗?
My Question is very simple, how is getline(istream, string) implemented?How can you solve the problem of having fixed size char arrays like with getline (char* s, streamsize n ) ?Are they using temporary buffers and many calls to new char[length] or another neat structure?
推荐答案
getline(istream& ;, string&)
的实现方式是读取一行。没有确定的实现。每个库可能互不相同。
getline(istream&, string&)
is implemented in a way that it reads a line. There is no definitive implementation for it; each library probably differs from one another.
可能的实现:
istream& getline(istream& stream, string& str)
{
char ch;
str.clear();
while (stream.get(ch) && ch != '\n')
str.push_back(ch);
return stream;
}
这篇关于getline的实现(istream& is,string& str)的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!