Question

How to get the first line of a multi-line string in C++

Answer 1

#include <iostream>
#include <sstream>
#include <string>

std::string getFirstLine(const std::string& multiLineString) {
    std::istringstream stream(multiLineString);
    
    std::string firstLine;
    std::getline(stream, firstLine);
    
    return firstLine;
}

int main() {
    std::string multiLineString = 
        "First line\n"
        "Second line\n"
        "Third line\n"
        "Fourth line";
    
    std::string firstLine = getFirstLine(multiLineString);
    
    std::cout << "The first line is: " << firstLine << std::endl;
}



 
/*
run:
 
The first line is: First line
 
*/

 

70+ SQL courses for beginners and professionals