Understanding Structs in C++

What is the correct syntax to define a struct in C++?

• struct { memberName: dataType; } StructName;

• struct StructName: dataType memberName;

• StructName struct { memberName dataType; };

• struct StructName { dataType memberName; };

How can you access a member of a struct in C++?

• Access members using the colon operator (::).

• Members can only be accessed through a function.

• Use the dot operator (.) or arrow operator (->) to access members of a struct.

• Use the semicolon (;) to access members of a struct.

Can a struct in C++ contain member functions? If so, how?

• No, a struct in C++ cannot contain member functions.

• Only classes can have member functions in C++.

• Yes, a struct in C++ can contain member functions.

• Structs in C++ can only contain data members, not functions.

What is a nested struct and how is it defined in C++?

• A nested struct is a type of variable in C++.

• A nested struct can only contain primitive data types.

• A nested struct is defined outside of any other struct.

• A nested struct is a struct defined within another struct in C++. It is defined by placing the inner struct declaration inside the outer struct.

How do you declare an array of structs in C++?

• struct MyStruct { int a; float b; }; MyStruct myArray[10];

• struct MyStruct[] myArray;

• MyStruct myArray = new MyStruct[10];

• MyStruct myArray(10);

What is the difference between a struct and a class in C++?

• Structs cannot have member functions; classes can.

• Structs have public members by default; classes have private members by default.

• Structs can inherit from other structs; classes cannot.

• Classes are used for data only; structs are used for functions only.

How do you pass a struct to a function in C++?

• You must always pass a struct by reference.

• You can pass a struct to a function in C++ by value, by reference, or by pointer.

• Structs cannot be passed to functions in C++.

• You can only pass a struct by value.

What happens when you pass a struct by value to a function?

• A copy of the struct is created, and modifications do not affect the original.

• A reference to the original struct is passed.

• The struct is automatically converted to a different type.

• The original struct is modified directly.

Can you have an array of nested structs in C++?

• No, nested structs cannot be used in arrays.

• Only arrays of simple data types are allowed.

• You can only have a single struct in an array.

• Yes, you can have an array of nested structs in C++.

How do you initialize a struct in C++?

• Point p1 = {1, 2}; or Point p2(1, 2);

• Point p1 = new Point(1, 2);

• Point p1 = (1, 2);

• Point p1; p1.x = 1; p1.y = 2;