How do I declare an array of objects whose class has no default constructor?

Question

If a class has only one constructor with one parameter, how to declare an array? I know that vector is recommended in this case. For example, if I have a class

Answer 1

In straight C, using int foo[10000] = {1}; will initialize the first array item to 1 and the remainder of the array to zero. Does C++ not auto-initialize unspecified array members, or does this require a default constructor?