delete 数组后 指针是否为null 博客分类： c++

/** \brief
    测试 delete 数组指针后，数组指针是否为 nullptr
 *
    测试结果： delete 数组指针后， 数组指针不为 nullptr
 *
 * \param
 * \param
 * \return
 *
 */
#include <iostream>



using std::cout ;

int main(){

    int * ary = new int [100];

    if(ary == nullptr) cout << "ary == nullptr \n";
    else {

        cout << "ary pointer is not nullptr.\n";
    }

    ary[1] = 1l;

    ary[2] = 12;

    delete []  ary;

    ary = nullptr;

    if(ary==nullptr) cout << "ary == nullptr \n";

    else {

        cout << "ary pointer is not nullptr.\n";
    }

    return 0;
}

 

 

ary pointer is not nullptr.
ary == nullptr 

Process returned 0 (0x0)   execution time : 0.004 s
Press ENTER to continue.