Summary  
This chapter covers pointer arithmetic in code, demonstrating how to navigate and manipulate memory addresses by incrementing, decrementing, adding, and subtracting pointers.  

General domain of usage  
Array and buffer processing

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

int getValueByPointerOffset(int* p_start, int* p_target);

TEST_CASE("Start=10, Target=20 should return 20", "[getValueByPointerOffset]") {
    int firstVariable = 10;
    int secondVariable = 20;

    int result = getValueByPointerOffset(&firstVariable, &secondVariable);
    int expected = 20;

    REQUIRE(result == expected);
}

TEST_CASE("Start=5, Target=15 should return 15", "[getValueByPointerOffset]") {
    int firstVariable = 5;
    int secondVariable = 15;

    int result = getValueByPointerOffset(&firstVariable, &secondVariable);
    int expected = 15;

    REQUIRE(result == expected);
}

TEST_CASE("Start=-10, Target=0 should return 0", "[getValueByPointerOffset]") {
    int firstVariable = -10;
    int secondVariable = 0;

    int result = getValueByPointerOffset(&firstVariable, &secondVariable);
    int expected = 0;

    REQUIRE(result == expected);
}

TEST_CASE("Start=100, Target=50 should return 50", "[getValueByPointerOffset]") {
    int firstVariable = 100;
    int secondVariable = 50;

    int result = getValueByPointerOffset(&firstVariable, &secondVariable);
    int expected = 50;

    REQUIRE(result == expected);
}

TEST_CASE("Start=0, Target=0 should return 0", "[getValueByPointerOffset]") {
    int firstVariable = 0;
    int secondVariable = 0;

    int result = getValueByPointerOffset(&firstVariable, &secondVariable);
    int expected = 0;

    REQUIRE(result == expected);
}

test.cpp

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Challenge: Pointer Arithmetic

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