c、c++ 结构体的嵌套

来源：互联网发布：linux top 参数编辑：程序博客网时间：2024/04/27 23:26

c、c++ 结构体的嵌套

/************************************************************************//* 嵌套结构体                                                                     * C++ **//************************************************************************/struct A {private:int a1[20];public:void initialize();struct B {private:A *b;int *p;public:void initialize(A *a);void next();int read;void set(int i);};friend A::B;};void A::initialize(){memset(a1, 0, sizeof(a1));}void A::B::initialize(A *a){b = a;p = a->a1;}void A::B::set(int i){*p = i;}/*void main(){A a;A::B b1,b2;int i;a.initialize();b1.initialize(&a);b2.initialize(&a);for (i =0; i<20; i++){b1.set(i);b2.set(i);}}/************************************************************************//* C * 嵌套结构体 *  * *//************************************************************************/ typedef struct A{int year;int month;int day;};typedef struct B {string name;int age;union{A aa;}xy;struct A aa1;};void main(){B *b1 =NULL;b1->xy.aa.day =1991;b1->aa1.month = 7;getchar();}

5 0