Function rev_arr

CPP/recursion/rev_array.cpp:8–14

#define mod 1000000007
#define endl '\n'
void rev_arr(int arr[],int i,int n)
{
	if(i>=n/2)
		return;
	swap(arr[i],arr[n-i-1]);
	rev_arr(arr,i+1,n);
}
int main(){
	cin.tie(0)->sync_with_stdio(0);
	int n;