What does → mean in c++?

In C, the "→" operator (member access operator) is used to access members of a class, including: Data member access: Returns a reference to a data member. Member function call: Returns a function pointer pointing to the member function. The "→" operator only works on pointers to instances of classes, for value types the . operator should be used.

The “→” operator in C

In C, the “→” operator is called "Member access operator", which is used to access class members. Specifically, it is used to access data members and member functions in a class.

Grammar

The syntax of the "→" operator is:

<code class="cpp">objectPtr->member</code>

Among them:

• ##objectPtr is a pointer to an instance of the class.
• member is a data member or member function in a class.

Usage: Data member access

When the "→" operator is used to access a data member, it returns a reference to the data member. The following example shows how to access the

name data member of a class:

<code class="cpp">class Person {
public:
    string name;
};

int main() {
    Person person;
    person.name = "John Doe";

    string& name = person->name;
    cout << name << endl; // 输出："John Doe"
}</code>

Usage: Member function call

When the "→" operator is used When a member function is called, it returns a function pointer. The following example shows how to call the

getName member function of a class:

<code class="cpp">class Person {
public:
    string getName() { return name; }
    string name;
};

int main() {
    Person person;
    person.name = "John Doe";

    string (*getName)(Person*) = person->getName;
    string name = getName(&person);
    cout << name << endl; // 输出："John Doe"
}</code>

Note

The "→" operator can only be used A pointer to an instance of a class.
• For value types, the "→" operator cannot be used, only the
• . operator can be used.
The "→" operator has higher priority than the "*" and
• . operators.

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