//每次写代码总是被迭代器的iter->和*iter弄晕，主要是被protobuf弄晕了#include <vector>struct test{    test(){        memset(this, 0, sizeof(test));    }    int a;    int b;};int main(){    test a, b;    a.a = a.b = 0;    b.a = b.b = 1;    //std::vector<test> vecT;    //vecT.push_back(a);    //vecT.push_back(b);    //for (std::vector<test>::iterator it = vecT.begin(); it != vecT.end(); ++it)    //{    //    int v_a = it->a;//直接访问元素中的成员    //    int v_b = it->b;    //    v_a = (*it).a;//(*it)直接就是vector中的保存的元素    //    v_b = (*it).b;    //}    std::vector<test*> vecT;    vecT.push_back(&a);    vecT.push_back(&b);    for (std::vector<test*>::iterator it = vecT.begin(); it != vecT.end(); ++it)    {        int v_a = (*it)->a;//必须用(*it)获取到指针，然后访问到a        int v_b = (*it)->b;    }        return 0;}