Example: Find Min Max in Array (Using Pointers) in C

// Find Min Max in Array (Using Pointers)
#include <stdio.h>

int main() {
    // Step 1: Declare and initialize an array
    int arr[] = {12, 5, 89, 3, 27, 45, 9};
    int n = sizeof(arr) / sizeof(arr[0]); // Calculate the number of elements

    // Step 2: Initialize min_val and max_val with the first element
    int min_val = arr[0];
    int max_val = arr[0];

    // Step 3: Declare a pointer and point it to the second element
    // The loop will go from the second element up to, but not including, the end
    int *ptr = arr + 1; // Points to arr[1]
    int *end_ptr = arr + n; // Points one past the last element

    // Step 4: Iterate using the pointer
    while (ptr < end_ptr) {
        // Step 5: Compare the value pointed to by ptr with min_val and max_val
        if (*ptr < min_val) {
            min_val = *ptr;
        }
        if (*ptr > max_val) {
            max_val = *ptr;
        }
        ptr++; // Move the pointer to the next element
    }

    // Step 6: Print the results
    printf("Array elements: ");
    for (int i = 0; i < n; i++) {
        printf("%d ", arr[i]);
    }
    printf("\n");
    printf("Smallest element: %d\n", min_val);
    printf("Largest element: %d\n", max_val);

    return 0;
}