50. Reverse an Array Using Only Pointers

#include <stdio.h>

void reverse_array(int *ptr, int n) {
    // Your logic here
	int start_idx = 0;
	int end_idx = n-1;

	while(start_idx < end_idx){

		int temp = 0;
		temp = *(ptr + start_idx);
		*(ptr + start_idx) = *(ptr + end_idx);
		*(ptr + end_idx) = temp;

		start_idx++;
		end_idx--; 
	}
}

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;
}