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C++ Lessons : 21.1. Dereferencing


quix
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Get Memory Address and Value

In the example from the previous page, we used the pointer variable to get the memory address of a variable (used together with the & reference operator). However, you can also use the pointer to get the value of the variable, by using the * operator (the dereference operator):

Example

string food = "Pizza";  // Variable declaration
string* ptr = &food;    // Pointer declaration

// Reference: Output the memory address of food with the pointer (0x6dfed4)
cout << ptr << "\n";

// Dereference: Output the value of food with the pointer (Pizza)
cout << *ptr << "\n";

 

Note that the * sign can be confusing here, as it does two different things in our code:

·         When used in declaration (string* ptr), it creates a pointer variable.

·         When not used in declaration, it act as a dereference operator.

 

1.png.56210348f845fad9f2d8f843d77e3c16.png

Click! : adelinrzo

Click! quiixx.

Click! : raizo

 

Guardian of Leaks!

 

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image.png.990bdf55e8ebaad7e92cc11967598b8d.png (12.03.2023)

image.png.25e5d76f6f7de46f49423812d3d500a3.png (30.03.2023)

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