use Regexp::Common qw( comment );
local $/ = undef;
$_ = <DATA>;
s/$RE{comment}{C}//gs;
print;

__DATA__
/*This is the file which is used for the
 developing the code for multiple IO operation
 Author : Grey*/int myfunc();/* remove */
 
void main();

/*This is another comment */
void main()
{
 int a, b;
 int d; //This is the temp copy buffer. /* This breaks regex solutions
 a = 10;
 b = 11;//This is the temp value assigned to the variables
 c = a+b;
 d = c+1; /*I am copying this with a increment*/
}