C :

#include<stdio.h>
main()  
{float F,c;  
scanf("%f",&F);  
c=5*(F-32)/9;  
printf("c=%.2f",c);  
}

C++ :

#include<stdio.h>
main()
{
float a,c,F;
scanf("%f",&a);
F=a;c=5*(F-32)/9;
printf("c=%.2f",c);
}

Pascal :

var n:real;
begin
  readln(n);
  write('c=',5*(n-32)/9:0:2);
end.

Java :

import java.text.DecimalFormat;
import java.util.Scanner;

public class Main {
   private static Scanner s = new Scanner(System.in) ;
   private static DecimalFormat df = new DecimalFormat("0.00") ;
   public static void main(String[] args) {
	   double F = s.nextDouble() ;
	   double c = 5*((F-32)/9) ;
	   System.out.println("c="+df.format(c));
   }
}