It is possible to write, but the compiler dont find the function when I want to use func(x):
template <class T>
double func(const double& x, const double& error = 0)
{...}I have to write separately, like this why?
template <class T>
double func(const double& x, const double& error)
{...}
template <class T>
double func(const double& x)
{double error = 0; ...}
Because that's not how C++ was defined.
It is possible to write, but the compiler dont find the function when I want to use func(x):
template <class T> double func(const double& x, const double& error = 0) {...}
Reference to ... what? NULL?
Are you passing by reference when you don't need to? Are you using T anywhere?
template <class T>
double func(const T &x, double error = 0)
{
// ...
return x;
}
int main(){
double a = 1.0 / 3.0, err = 5;
func(a,err);
}??
but you cannaot call func(a), can you?
Instead of const double& error = 0 you could code it as const double* error = NULL . References can not be NULL, but pointers can.
but you cannaot call func(a), can you?
Simply giving it a try would have gotten you an answer much quicker.
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