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                數組的底層實現是利用了指針,因此,我們甚至可以大膽的說,其實c/c++里根本不存在什么數組,所謂的數組不過是利用指針玩的小把戲而已 從原理上來講,指針和數組是同一個方法的不同表達,而數組名本身就是一個指針,數組元素只是這個指針按照一定量偏移后對應的內存區域里的內容。 因此我們嘗試一下按照數組的使用方式來使用一下指針,看看發生什么事情 ``` int main() { int a[5]; //定義一個5個元素數組 int* p{ a}; //數組地址給指針,換句話說數組的底層也是指針 *p = 5; a[0] = 5; a[1] = 1000; a[2] = 2000; a[3] = 2000; std::cout <<p[0]; //指針直接可以數組形式來用。 ``` ![](https://img.kancloud.cn/c2/8e/c28e285f7712c6e4efc0be147ecbacf4_1381x872.png)
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