Read a string line by line using c++

Question

I have a std::string with multiple lines and I need to read it line by line. Please show me how to do it with a small example.

Ex: I have a string string h;

h will be:

Hello there. How are you today? I am fine, thank you. 

I need to extract Hello there., How are you today?, and I am fine, thank you. somehow.

Answer 1

#include <sstream> #include <iostream>  int main() {     std::istringstream f("line1\nline2\nline3");     std::string line;         while (std::getline(f, line)) {         std::cout << line << std::endl;     } } 

Answer 2

There are several ways to do that.

You can use std::string::find in a loop for '\n' characters and substr() between the positions.

You can use std::istringstream and std::getline( istr, line ) (Probably the easiest)

You can use boost::tokenize