Answer Posted / arul

The arguments distinguish functions with the same name
(functional polymorphism). The name alone does not
necessarily identify a unique function. However, the name
and its arguments (signatures) will uniquely identify a
function.
In real life we see suppose, in class there are two guys
with same name, but they can be easily identified by
their signatures. The same concept is applied here.
ex:
class person
{
public:
char getsex();
void setsex(char);
void setsex(int);
};
In the above example we see that there is a function setsex
() with same name but with different signature.

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