Early Binding

Selecting a function in normal way, in during compilation time is known as static binding or early binding. During compilation time the C++ compiler determines which  function  is  used  based  on  the  parameters passed  to  the  function  or  the function's return type. A compiler after that substitutes the correct function for every invocation. Like as compiler based substitution is known as static linkage. Through default C++ follows early binding.