Pointer arithmetic in C++ - Mini Project: Build & Apply

Pointer Arithmetic Basics

📖 Scenario: You are working with a list of daily temperatures stored in an array. You want to use pointers to access and manipulate these temperatures.

🎯 Goal: Learn how to use pointer arithmetic to access elements in an array and print their values.

📋 What You'll Learn

Create an integer array with exact values

Create a pointer to the first element of the array

Use pointer arithmetic to access array elements

Print the values accessed by the pointer

💡 Why This Matters

🌍 Real World

Pointer arithmetic is used in low-level programming to efficiently access and manipulate data stored in arrays or buffers.

💼 Career

Understanding pointers and pointer arithmetic is essential for systems programming, embedded development, and performance-critical applications.

1

Create an integer array

Create an integer array called temps with these exact values: 23, 25, 21, 19, 22.

C++

// Create the integer array 'temps' with the given values
// Your code here

Need a hint?

Use curly braces to list the values inside the array declaration.

2

Create a pointer to the array

Create a pointer to int called ptr and set it to point to the first element of the temps array.

C++

int temps[] = {23, 25, 21, 19, 22};
// Create a pointer 'ptr' that points to the first element of 'temps'
// Your code here

Need a hint?

Set the pointer equal to the array name to point to its first element.

3

Use pointer arithmetic to access elements

Use pointer arithmetic with ptr to access the third element of the array and store it in an integer variable called third_temp.

C++

int temps[] = {23, 25, 21, 19, 22};
int* ptr = temps;
// Use pointer arithmetic to get the third element and store in 'third_temp'
// Your code here

Need a hint?

Remember that array indexing starts at 0, so the third element is at index 2.

4

Print the accessed value

Print the value of third_temp using std::cout.

C++

#include 

int main() {
    int temps[] = {23, 25, 21, 19, 22};
    int* ptr = temps;
    int third_temp = *(ptr + 2);
    // Print the value of 'third_temp'
    // Your code here
    return 0;
}

Need a hint?

Use std::cout << third_temp << std::endl; to print the value.