What does it mean when we use a variable in C ++ as a function with a default value as its parameter?
I was reading a line of C ++ code. I came across a strange line of code where a variable was being used as a function with 0 as its parameter!
template <class T> class Stack {
T data[50];
int nElements;
public:
//This line is where the variable was used like a function!
Stack() : nElements(0){}
void push(T elemen);
T pop();
int tamanho();
int isEmpty();
};
So what exactly does it mean when we have: constructor: private variable (0) {}
This line of code was very strange to me! Thanks to
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In the initializer_list of the constructor, the Stack
class member is nElements
initialized to null when each is created Stack
.
The meaning 0
here doesn't really matter, other than setting the initial cardinality for Stack
to zero as soon as it is created and empty.
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