50. Reverse an Array Using Only Pointers

#include <stdio.h>

void reverse_array(int *ptr, int n) {
    // Your logic here
    int *pEnd;
    pEnd = ptr; 

    for (int i =0; i<n; i++){
        // printf("%d ", *pEnd); 
        ++pEnd; 
    }
    --pEnd; 
    int temp; 
    while (ptr < pEnd){
        temp = *pEnd; 
        *pEnd = *ptr;
        *ptr = temp; 

        ptr++;
        pEnd--; 
        n--; 

    }
}

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;
}