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

Answer 1

#include 
#include 

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