C++ new运算符

使用new运算符会调用对象的构造函数

class test
{
private:
    /* data */
public:
    int val = 0;
    test(/* args */);
    ~test();
};

test::test(/* args */)
{
    val = 100;
}

主函数：

int main(int argc, char* argv[]) {
    test* testArr = new test[10];
    for (int i = 0; i < 10; i++)
    {
        std::cout<< i << " is "<< testArr[i].val << std::endl;
    }
    delete [] testArr;
    return 0;
    
}

结果：

0 is 100
1 is 100
2 is 100
3 is 100
4 is 100
5 is 100
6 is 100
7 is 100
8 is 100
9 is 100