how on compilator

Answer 1

To see the full discussion in Stack Overflow (which Apoorva copy and paste it from there) see:

[https://stackoverflow.com/documentation/c%2b%2b/4708/compiling-and-building#t=201710090842153967239]

Answer 2

The compiler parses the pure C++source code (now without any preprocessor directives) and converts it into assembly code. Then invokes underlying back-end(assembler in toolchain) that assembles that code into machine code producing actual binary file in some format(ELF, COFF, a.out, ...).