double test = 0.3;
printf("%.5f", test);

Line 2: error: expected declaration specifiers or '...' before string constant
Line 2: error: expected declaration specifiers or '...' before 'test'
Line 2: warning: data definition has no type or storage class
Line 2: error: conflicting types for 'printf'
t.c:3: note: a parameter list with an ellipsis can't match an empty parameter name list declaration