int lang_arith_fpe(float a, float b,
                   double c, double d,
                   long double e, long double f){
   if (a == b){     /* 'Floating Point Equality' warning issued here */
      return 1;
   }
   if (c != d){     /* 'Floating Point Equality' warning issued here
                     * (issued for inequality checks as well as equality checks) */
      return 2;
   }
   if (e == 0.0L){  /* 'Floating Point Equality' warning issued here
                     * (one operand can be a constant) */
      return 3;
   }
   if (f == 0){     /* 'Floating Point Equality' warning issued here
                     * (coercion is taken into account) */
      return 4;
   }
   if (0.0 == 0.0){ /* 'Floating Point Equality' warning issued here
                     * (both operands can be constants) */
      return 5;
   }
}