Inline function prototype vs regular declaration vs prototype

Question

What\'s the difference between inline function and then main like so:

inline double cube(double side)
{
   return side * side * side;
}

int main( )
{
    cu         


        

Answer 1

The 3 program compile to exactly the same with g++ -S -O3 $file.cc. Except for the second example where the definition of double cube(double side) still exist in a non inlined form though inlined in int main().

_main:
pushl   %ebp
movl    $16, %eax
movl    %esp, %ebp
subl    $8, %esp
andl    $-16, %esp
call    __alloca
call    ___main
leave
xorl    %eax, %eax
ret