/in/foo.cc:1:1: error: 'include' does not name a type
 include<stdio.h>
 ^~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:6:16: error: 'scanf' was not declared in this scope
 scanf("%lf", &a);
                ^
/in/foo.cc:7:18: error: 'printf' was not declared in this scope
 printf("%lf\n", a);
                  ^