pfcppStudy

practicing proffessional cpp book

Standard Library

comments, module import (include), main(), I/O stream

Hello World example

Build process

1. preprocess processs meta data from source code
2. complie compile source code into machine code, object file (.o)
3. link link multiple object files into application

directive

expressions for preprocess
starts with #

examples

#include [file]
#define [key] [value]
#ifdef [key] / #endif
#ifndef [key] / #endif
#pragma [xyz]

pragma examples

#pragma once -> define header with duplication check

main()

int main(int argc, char* argv[])
argv[0] -> name of program

I/O stream

<format> in C++ 20
printf, scanf -> type safety insecure

namespace

space to resolve name collision problem