float()

[vsgdp]

Hi,

#include <iostream>

int main()
{
std::cout << float() << std::endl;
}

Outputs 0, is this standard or implementation defined? Is float() a
default constructor for float?

 

[Mike Wahler]

Hi,

#include <iostream>

int main()
{
std::cout << float() << std::endl;
}

Outputs 0, is this standard or implementation defined?
Standard.

Is float() a
default constructor for float?

The expression 'float()' creates a temporary,
'default-initialized' object of type 'float'.
Built-in types don't really have constructors,
but the same syntax is used for expressing a
default-initialized object of any type.

-Mike