50. Reverse an Array Using Only Pointers

#include <stdio.h>

void reverse_array(int *ptr, int n) {
    
     int m = (n/2)-1;
     //printf("m=%d\n",m);
     for(int x = 0 ; x <= m ; x++)
     {
          int tmp = *(ptr+x);
          *(ptr+x) = *(ptr+n-1-x);
          *(ptr+n-1-x) = tmp;
          
          //printf("[%d,%d] ",a,b);
     }
}

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;
}