内存四区

//放在主函数外面就是全局变量
//全局变量
int g_a = 10;
int g_b = 10;
//全局常量
//const表示常量
const int c_g_a = 10;
const int c_g_b = 10;
int main() {
//局部变量
int a = 10;
int b = 10;
//打印地址
cout << "局部变量a地址为： " << (int)&a << endl;
cout << "局部变量b地址为： " << (int)&b << endl;
cout << "全局变量g_a地址为： " << (int)&g_a << endl;
cout << "全局变量g_b地址为： " << (int)&g_b << endl;
//静态变量
    //在数据前面加上static就转化为了静态变量
static int s_a = 10;
static int s_b = 10;
cout << "静态变量s_a地址为： " << (int)&s_a << endl;
cout << "静态变量s_b地址为： " << (int)&s_b << endl;
cout << "字符串常量地址为： " << (int)&"hello world" << endl;
cout << "字符串常量地址为： " << (int)&"hello world1" << endl;
cout << "全局常量c_g_a地址为： " << (int)&c_g_a << endl;
cout << "全局常量c_g_b地址为： " << (int)&c_g_b << endl;
const int c_l_a = 10;
const int c_l_b = 10;
cout << "局部常量c_l_a地址为： " << (int)&c_l_a << endl;
cout << "局部常量c_l_b地址为： " << (int)&c_l_b << endl;
system("pause");
return 0;
}

#include<iostream>
using namespace std;
int* func() {
 int a = 10;
 return &a;
}
int main() {
 int* p = func();
 cout << *p << endl;
 return 0;
}

#include<iostream>
using namespace std;
int* func() {
  int* a = new int(10);
  return a;
}
int main() {
  int* p = func();
  cout << *p << endl;
  cout << *p << endl;
  delete  p;
  system("pause");
  return 0;