翻转数组

思路：定义一个左指针和一个右指针，然后判断大小，然后交换

#include <iostream>

using namespace std;

int main() {
    int arr[] = {1,2,3,4,5,6,7} ;
    int left = 0;
    int right = sizeof(arr) / sizeof(arr[0]) - 1;
    while (left < right){
        int temp = arr[left];
        arr[left] = arr[right];
        arr[right] = temp;
        left++;
        right--;
    }
    for (int i = 0; i < 7; ++i) {
        cout<< arr[i] <<endl;
    }


    return 0;
}