Inline (strange behavior)

[anonymous12345]

hello to everyone,

1)
if i declare a function in a header file like this :

void Foo() { /* code here*/}

the linker will fail due to multiple definition !!! (Foo already defined in Myclass.obj)

2)

but if i declare it like this :

inline void Foo() { /* code here*/}

it compiles normally.

So here is the questions :

a) since i declared the function in the header file, isnt it by default inline ?
Why do i have to specify the inline keyword again ?

b) what if a compiler decides to ignore the inline keyword ? will it result in multiple definition during link time ?

thank you,