Summary  
This chapter explains that dereferencing a pointer accesses and modifies the exact memory location of its target variable, making changes via the pointer equivalent to changing the variable directly.

General domain of usage  
Low-level memory manipulation (e.g., embedded systems programming)

When you modify the value through the **dereferenced pointer**, you are essentially modifying **the content of the memory location** it points to. This directly affects the original variable.

> Remember
>
> Changing the value through `*(p_variable)` **is equivalent** to changing the value of `variable`.

#define CATCH_CONFIG_MAIN
#include <catch2/catch.hpp>

void normalizeSensor(float* p_sensor);

TEST_CASE("Sensor value -5 should normalize to 0", "[normalizeSensor]") {
    float sensor = -5.0f;
    normalizeSensor(&sensor);
    float expected = 0.0f;
    REQUIRE(sensor == expected);
}

TEST_CASE("Sensor value 150 should normalize to 100", "[normalizeSensor]") {
    float sensor = 150.0f;     
    normalizeSensor(&sensor);
    float expected = 100.0f;    
    REQUIRE(sensor == expected);
}

TEST_CASE("Sensor value 75 should remain 75 after normalization", "[normalizeSensor]") {
    float sensor = 75.0f;      
    normalizeSensor(&sensor);
    float expected = 75.0f;     
    REQUIRE(sensor == expected);
}

TEST_CASE("Sensor value 0 should remain 0 after normalization", "[normalizeSensor]") {
    float sensor = 0.0f;      
    normalizeSensor(&sensor);
    float expected = 0.0f;     
    REQUIRE(sensor == expected);
}

TEST_CASE("Sensor value 100 should remain 100 after normalization", "[normalizeSensor]") {
    float sensor = 100.0f;     
    normalizeSensor(&sensor);
    float expected = 100.0f;    
    REQUIRE(sensor == expected);
}

test.cpp

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Learn the basics of pointers in a simple, not overwhelming manner! Explore how pointers work, their syntax, and practical applications through clear examples and easy-to-follow explanations.

Explore how pointers, which store memory addresses, can be manipulated using arithmetic operations. Learn to navigate through memory locations, access data structures efficiently, and optimize code for performance.

Explore the concept of references as aliases for variables and memory-efficient access to data. Learn how references contribute to cleaner code, improved readability, and enhanced performance by avoiding unnecessary data duplication.

Uncover the principles and techniques behind allocating and deallocating memory dynamically during program execution. Understand the advantages and challenges of dynamic memory allocation.

Link Between Pointer and Variable

Solution

Awesome!

Link Between Pointer and Variable

Solution