Can Class Data Members Be Directly Initialized?

In C , class data members cannot be initialized using the direct initialization syntax, (), as seen in the following example:

#include 

class test {
public:
    void fun() {
        int a(3);
        std::cout 
The compilation fails with errors:
11    9 [Error] expected identifier before numeric constant
11    9 [Error] expected ',' or '...' before numeric constant
Why is this the case?
The C   standard explicitly prohibits this syntax for class data member initialization. Early proposals for the feature's introduction cited parsing problems as the reason.
Consider this ambiguous example:
struct S {
    int i(x); // data member with initializer or...
    // ...
    static int x;
    int i(y); // member function declaration
    // ...
    typedef int y;
};
The standard proposes a solution:
To eliminate ambiguity, the C   standard allows only the following syntax for class data member initialization:
= initializer-clause
{ initializer-list }
This resolution ensures clarity and avoids the potential for misunderstanding in cases where a declaration could resemble both an object and a function declaration.