指针赋值

#include<iostream>using namespace std;int *intPointer;void Fun(){    intPointer=new int;    *intPointer=25;}int main(){    Fun();    cout<<"delete使用前:";    cout<<"*intPointer:"<<*intPointer<<" "<<"intPointer:"<<intPointer<<endl;    delete intPointer;    cout<<"delete使用后:";    cout<<"*intPointer:"<<*intPointer<<" "<<"intPointer:"<<intPointer<<endl;    return 0;}

 

备注：函数中新声明的变量是局部变量，函数结束后，变量被函数回收，指针变为野指针。使用C++中new得到的内存总是可以访问的，除非使用delete将内存还给系统。