【C++进阶】 to_string,stringstream
to_string函数主要进行以下一些参数转换为string
stringstream,位于<sstream>库中
https://blog.csdn.net/jllongbell/article/details/79092891
<sstream>库定义了三种类:istringstream、ostringstream和stringstream,分别用来进行流的输入、输出和输入输出操作。
1.stringstream::str(); returns a string object with a copy of the current contents of the stream.
2.stringstream::str (const string& s); sets s as the contents of the stream, discarding any previous contents.
3.stringstream清空,stringstream s; s.str("");
4.实现任意类型的转换
template<typename out_type, typename in_value>
out_type convert(const in_value & t){
stringstream stream;
stream<<t;//向流中传值
out_type result;//这里存储转换结果
stream>>result;//向result中写入值
return result;
}