Primitive_type5 doesn't check the result

[sinjin314]

the result isn't checked, so the result can be 3.5 is 3.5 years old. instead of Furry McFurson is 3.5 years old. the first result have been checked and passed the test. so just compare the output and no just see if the programe compile.

[jrvidal]

#278 will slightly improve this (and other exercises that pass without actually testing anything) by giving you a chance to inspect the input before moving on.