50. Reverse an Array Using Only Pointers

#include <stdio.h>

void reverse_array(int *ptr, int n) {
    int l = 0, r = n-1;
    while(l < r) {
        int temp = *(ptr + l);
        *(ptr + l) = *(ptr + r);
        *(ptr + r) = temp;
        l++;
        r--;
    }
}

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

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

    reverse_array(ptr, n);

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

    return 0;
}