[C++] why it doesn't increment if argument is a float?

Question

Result is "223":

template<class T>
void f(T){
static int i = 1;
cout << ++i;
}
int main(){
f(1);
f(1.0);
f(1);
}

Answer 1

Because template expansion is done during compile time and not at runtime.

So at runtime there exist 2 seperate functions "f ()" ( one for float and one for int ) and f(1.0) is calling different function than f(1)