C++ :

#include<bits/stdc++.h>
using namespace std;
double a;
int main()
{
	while(cin>>a)
		printf("%.2f\n",a);
   return 0;
}

Pascal :

program p(input,output);
var
  a:real;
begin
  while not eof(input) do
   begin
    readln(a);
    writeln(a:0:2);
   end;
end.