/in/foo.c: In function 'main':
/in/foo.c:28:3: error: expected ')' before 'printf'
   printf("%.2f+%.2fi\n%.2f-%.2fi\n",p,n,p,n);
   ^~~~~~
/in/foo.c:29:3: error: expected ';' before '}' token
   }
   ^
/in/foo.c:6:33: warning: variable 'n' set but not used [-Wunused-but-set-variable]
     double a,b,c,x1,x2,disc,q,p,n;
                                 ^