Running a c++ file

[! C++ is a compiled language.]

• source files (code you write) → compiler “translates” them into machine code (binaries)
  • every .cpp file gets compiled individually into an object file (`.obj)
  • compile Ctrl + Shift + B
  • then the linker takes all the .obj files and “glues” them together into one .exe file
• then you execute the file via terminal

• C++ comes with an extensive library called the C++ Standard Library (usually called the standard library) that provides a set of useful capabilities in your programs

• g++
  • Both COMPILER AND LINKER
• Output executable w specific name myprogram
  • g++ file.cpp -o myprogram
    • g++: The C++ compiler
    • file.cpp: The C++ source file you’re compiling
    • -o myprogram: The name of the output executable (machine code)
      • g++ takes file.cpp and generates object file (file.o)
        • contains machine code but not complete executable
      • g++ then after compiling, links file.o with any libraries you may have specified, creating final executable myprogram (without any extension)
        • fully linked and complete program
    • So the g++ compiler compiles the source code of file.cpp into an executable object file myprogram
• Output executable w/o specific name (defaults to a.out)
  • g++ file.cpp
  • since there are no -o flags, the default output file name is a.out (machine code)
• Running the executable myprogram (or a.out)
  • ./myprogram
  • this executable file will then be loaded o computer memory, and the computer’s CPU will execute the program instruction at a time
• Ctrl + Shift + B
  • Automatically builds for us

Some Visual Code configs

• Solution config and Solution platform
  • Solution config - Debug and Release
  • Solution platform - x64, x86
• Imp stuff to check