1.new 运算符：new 类型[初值]
new int;
new int(100)；
new char [10];
new int [5][4];//用new开辟数组空间时，不能指定初值。
float *p = new float (3.1415967);//开辟一个存放单精度的空间，并指定该实数的初值为3.1415967，将返回的该空间的地址赋给指针变量p
2.delete运算符：delete [ ]指针变量
delete p;//删除上述的float *p = new float (3.1415967);
delete [ ] pt;/删除/int * pt = new int [5][4];
#include <iostream>
#include <string>using namespace std;struct stu
{string name;int age;char sex;
};int main ()
{stu *p = new stu ;p->name = "cll";p->age = 13;p->sex = 'm';cout << p->name << " " << p->age << " " << p->sex << endl;delete p;system("pause");return 0;
}