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Compiler Error C2073

  • Article

'identifier' : elements of partially initialized array must have a default constructor

Remarks

Too few initializers were specified for an array of user-defined types or constants. If an explicit initializer and its corresponding constructor are not specified for an array member, a default constructor must be supplied.

This compiler error is obsolete in Visual Studio 2022.

Example

The following sample generates C2073. Source file C2073.cpp:

// C2073.cpp
class A {
public:
   A( int );   // constructor for ints only
};
A a[3] = { A(1), A(2) };   // C2073, no default constructor

A fix is shown here in source file C2073b.cpp:

// C2073b.cpp
// compile with: /c
class B {
public:
   B();   // default constructor declared
   B( int );
};
B b[3] = { B(1), B(2) };   // OK