C :

#include <stdio.h>
int main()
{
  double f,c;
  f=64.0;
  c=(5.0/9)*(f-32);
  printf("F=%f\nC=%f\n", f, c);
  return 0;
}

C++ :

#include<stdio.h>
int main()
{
	float F,C;
	scanf("%f",&F);
	C=(5.0/9)*(F-32);
	printf("F=%f\nC=%f\n",F,C);
	return 0;
}