50. Reverse an Array Using Only Pointers

#include <stdio.h>

void swap(int *num1,int *num2){
    *num1=*num1+*num2;
    *num2=*num1-*num2;
    *num1=*num1-*num2;
}
void reverse_array(int ptr[], int n) {
    // Your logic here
   int *start=ptr;
   int *end=(ptr+n-1);
    while(start<end){
        swap(start,end);
        end--;
        start++;
    }

}

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;
}