Parsing

[TommyCarstensen]

How can I put the lines of a file into an array, if I don't know the number of lines beforehand? Below is what I do in Python.

    with open(file_input_samples, 'r') as f:
        samples = [line.split()[1] for line in f][2:]

[kevinkjt2000]

Use a vector of strings:
http://www.cplusplus.com/reference/vector/vector/

#include <fstream>
#include <string>
#include <vector>

int main(int argc, char* argv[]) {
    std::fstream fin("input.txt");
    
    std::vector<std::string> lines;
    std::string line;
    while(getline(fin, line)) {
        lines.push_back(line);
    }
    
    return 0;
}