Write C++ One Full Program with Function to Implement Following: abs(x): return always be positive 1-Function (fnabs1) Absolute1 using by Val method 2-Function (fnabs2) Absolute2 using by Ref method...

Write C++ One Full Program with Function to Implement
 Following:

abs(x): return always be positive

1-Function (fnabs1) Absolute1 using by Val method

2-Function (fnabs2) Absolute2 using by Ref method
 main (Procedure):

user will enter number x in run-time mode
call (fnabs 1) for x and store in r1
call (fnabs2) for x and store in r2

compare r1 and r2 to see the result same or not

user will in loop until he enter (0) and program
terminate immediately