1 #include <stdio.h> 2 3 long double foo(long double arg)4 foo(long double arg) { 5 printf(" gnu %Lf\n", arg); 6 return arg; 7 } 8 9 int main()10 main() { 11 long double d; 12 d = foo(555.3333L); 13 printf("%Lf\n", d); 14 return 0; 15 } 16 17