vector调用push_back为什么会失败？初始化了也不行

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	慵懒 2015-4-30 14:22

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发表于 2015-4-14 10:06 |只看该作者 |倒序浏览

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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;
}

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