Reading a line from ifstream into a string variable

problem ：

In the following code : In the following code ：

#include <iostream>#include <fstream>#include <string>using namespace std;int main() {    string x = "This is C++.";    ofstream of("d:/tester.txt");    of << x;    of.close();    ifstream read("d:/tester.txt");    read >> x;    cout << x << endl ;}

Output :

This

Since >> operator reads upto the first whitespace i get this output. because >> operator Read the first space , I got this output .How can i extract the line back into the string ? How to lift the line ​​ Retrieve the string ？

I know this form of istream& getline (char* s, streamsize n ); I know this form istream& getline (char* s, streamsize n );but i want to store it in a string variable. But I want to store it in a string variable .How can i do this ? How can I do this ？

---

Solution ：

Reference resources ： https://stackoom.com/en/question/RxNr