c++操作符new 与delete学习(1)

看代码：

#include<stdio.h>
#include<stdlib.h>
#include<iostream>

//new 一个int
void main01()
{
int num = 10;//栈上
int *p = new int;
*p = 5;
std::cout << *p << " " << p << std::endl;
delete p;
std::cout << *p << " " << p << std::endl;
system("pause");
}

//new 一个int 数组
void main02()
{
int *p = new int[10];
int i = 0;

std::cout << p << std::endl;

for (int i = 0; i < 10; i++)
{
p[i] = i;
std::cout << p[i] << std::endl;

}

delete []p;

std::cout << p << std::endl;
system("pause");

}

//new 一个int 二维数组
void main04() {
int *p = new int[80];
int(*px)[10] = (int(*)[10])p; //强转
int data = 0;
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 10; j++)
{
px[i][j] = data++;
std::cout << " " << px[i][j];
}
std::cout << std::endl;
}

system("pause");

}