50. Reverse an Array Using Only Pointers

#include <stdio.h>

void swap(int *a, int *b){
    int temp = *a;
    *a = *b;
    *b = temp;
}

void reverse_array(int *ptr, int n) {
    // Your logic here
    if(n<=0)return;
    int *front_ptr = ptr; 
    int *back_ptr = ptr + (n-1);

    while(front_ptr < back_ptr){
        swap(front_ptr, back_ptr);
        front_ptr ++;
        back_ptr --;
    }
}

int main() {
    int n;
    scanf("%d", &n);

    int arr[100];
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    reverse_array(arr, n);

    for (int i = 0; i < n; i++) {
        printf("%d", arr[i]);
        if(i < n-1){
            printf(" ");
        }
    }

    return 0;
}