c++ cheatsheet

C++ Cheat Sheet (append to file).cpp

#include <fstream>
  
//STUFF

std::ofstream fileout;

fileout.open("filename.txt", std::ios_base::app);
fileout << "hello world"; 

//STUFF

chrono_timer.cpp

#include <chrono>

/*
 * ...
 */

auto start = std::chrono::high_resolution_clock::now();
/* 
 * do stuff
 */
auto stop = std::chrono::high_resolution_clock::now(); 
auto duration = std::chrono::duration_cast<std::chrono::nanoseconds>(stop - start); //or milliseconds
double duration_count = duration.count();

input.cpp

std::string input(std::string const &message) {
    std::string result;
    std::cout << message;
    getline(std::cin, result);
    return result;
}