vector调用push_back为什么会失败？初始化了也不行

[复制链接]

字体大小: 正常放大

结局我一人

16 主题	9 听众	31 积分

升级 27.37%

TA的每日心情

	慵懒 2015-4-30 14:22

签到天数: 1 天

[LV.1]初来乍到

自我介绍: 拉拉

电梯直达

1^#

发表于 2015-4-14 10:06 |只看该作者 |正序浏览

|招呼Ta 关注Ta

头文件handle.h
#ifndef _HANDLE_H
#define _HANDLE_H

class Handle{
struct StackOfInt;
StackOfInt* smile;
public:
void initialize();
void cleanup();
void push(int elem);
int fetch();
int pop();
int count();
};

#endif//_HANDLE_H

类class的函数定义
#include<iostream>
#include<vector>
#include "handle.h"
using namespace std;

struct Handle::StackOfInt{
vector<int> top;
};

void Handle::initialize()
{
StackOfInt* smile = new StackOfInt;
smile->top.reserve(100);
cout << smile->top.capacity() << endl;
}

void Handle::cleanup()
{
delete smile;
}

void Handle::push(int elem)
{
cout << "before push\n";
smile->top.push_back(elem);
cout << "after push\n";
}
int Handle::fetch()
{
return smile->top.back();
}
int Handle::pop()
{
int n = smile->top.back();
smile->top.pop_back();
return n;
}
int Handle::count()
{
return smile->top.size();
}

主函数 main.cpp
#include<iostream>
#include "handle.h"
using namespace std;

int main()
{
Handle h;
h.initialize();
for (int i = 0; i < 10; i++)
{
      h.push(i);
      cout << "last element is " << h.fetch() << endl;
}
for (int i = 0; i < 10; i++)
{
      h.pop();
}

return 0;
}

zan