reading a line from ifstream into a string variable

Question

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. How can i extract the line back into the string ?

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

Answer 1

Use the std::getline() from <string>.

 istream & getline(istream & is,std::string& str) 

So, for your case it would be:

std::getline(read,x);