C :

#include<stdio.h>
#include<math.h>
void main(){
     int F;
	 double c;
	 while(scanf("%d",&F)!=EOF){
		c=(F*100.0/100.0-32)*5/9;
		printf("%.2f\n",c);
		}

}

C++ :

#include<iostream>
using namespace std;
int main(){
  int a;
  double b;
  while(cin>>a){
    
    
      b =  (a-32) * 5 / 9.00;
	  
      printf("%0.2f",b);
	  cout<<endl;
    
  }
  return 0;
}

Pascal :

var
f,c:real;
begin
 while not(eof)do
 begin
  read(f);
  c:=(f-32)*5/9;
  writeln(c:0:2);
 end;
end.

Java :

import java.util.*; 
public class Main{ 
public static void main(String[] args)  { 
 Scanner in=new Scanner(System.in); 
  while(true){
      int F=in.nextInt();
      String Fstr=""+F;
      if(Fstr==null)break;
      	double f=(double)F;
      double c= (f-32)*5/9;
      System.out.printf("%4.2f\n",c);
      }
    }
}