c++ new 开辟内存堆区 delete 关键字释放堆区数据
#include <iostream>
using namespace std;
//1.new的基本用法
//new 开辟内存堆区
int * func(){
int *p = new int(10);
return p;
}
void test(){
int *p = func();
//堆区数据由程序员开辟，也由程序员释放
cout << *p << endl;
cout << *p << endl;
cout << *p << endl;
//delete 关键字释放堆区数据
delete p;
cout << *p << endl; //非法操作，程序报错
}
int main() {
test();
return 0;
}