sstream usage (subsequent update)

#include< sstream> Header file A
brief description of basic usage

Convert basic data types int, double, float, long, etc. into strings

int t;
	string st;
	stringstream s;
	t = 123;
	s << t;  //将数字输入到stringstream对象中
	s >> st; //将stringstream对象中的数据输入到字符串中

	cout << st;

Output result:

Similarly, it is also possible to convert a string to a basic data type, see the example.

double t;
	string st = "1.25678";
	stringstream s;
	s << st;	//将字符串输入到stringstream对象中
	s >> t;		//将stringstream对象中的数据输入到字符串中


	cout << t;

Output result: