load_csv.cpp

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

std::vector<std::string> split_string(std::string string_input, char delimeter) {
	std::vector< std::string > split_strings;
	std::string thing;
	
	for (auto a: string_input){
		if (a == delimeter) {
			split_strings.push_back(thing);
			thing.clear();
		} else {
			thing.push_back(a);
		}
	}
	if (thing.size()){
	split_strings.push_back(thing);
	}
	return split_strings;
}

std::vector < std::vector< std::string > > split_csv(std::string file_name, char delimeter) {
	std::fstream file(file_name);
	std::vector< std::vector< std::string> > return_value;
	std::string chunk;
	while (std::getline(file,chunk )) {
			return_value.push_back(split_string(chunk, delimeter));
	}
	return return_value;
}
int main(){
	auto resp = split_csv("file.csv", ',');
	
	for (auto a: resp) {
		std::cout << "line" << std::endl;
	for (auto l: a) {
		std::cout << l <<std::endl;
		}
	}
	return 0;
}