STL容器使用DEMO-vector

最新推荐文章于 2022-02-25 19:38:17 发布

yahreso

最新推荐文章于 2022-02-25 19:38:17 发布

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CC 4.0 BY-SA版权

文章标签： vector system c

本文链接：https://blog.youkuaiyun.com/yahreso/article/details/6473336

本文详细介绍了 C++ STL 中 vector 容器的基本操作与使用方法，包括插入、删除元素、容量与大小的区别、元素访问及容器间的赋值与交换等，并通过示例代码展示了如何运用这些功能。

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Code:

//////////////////////////////////////////////////////////////////////////
// Author: LIN YiQian
// Created: 2009/08/24
// Describe: STL vector 使用DEMO
//////////////////////////////////////////////////////////////////////////
#include <iostream>
#include <vector>
using namespace std;
typedef vector<int> INT_VEC;
// 打印Vector
void PrintVector(INT_VEC vecInt)
{
for (INT_VEC::iterator vecIter = vecInt.begin(); vecIter != vecInt.end(); ++vecIter)
{
cout << *vecIter ;
}
cout << endl;
}
// 逆向打印Vector
void PrintVectorReversse(INT_VEC vecInt)
{
for (INT_VEC::reverse_iterator vecRIter = vecInt.rbegin(); vecRIter != vecInt.rend(); ++vecRIter)
{
cout << *vecRIter;
}
cout << endl;
}
void main(void)
{
INT_VEC vecInt1;
cout << "vecInt1(): "; PrintVector(vecInt1);
// insert()
{
vecInt1.insert(vecInt1.begin(), 5);
vecInt1.insert(vecInt1.begin()+1, 4, 6);
cout << "vecInt1() after Insert: "; PrintVector(vecInt1);
}
INT_VEC vecInt2(10, 3);
cout << "vecInt2(10, 3): "; PrintVector(vecInt2);
// erase()
{
vecInt2.erase(vecInt2.begin()+5);
cout << "vecInt2 after Erase: "; PrintVector(vecInt2);
cout << "vecInt2 size: " << vecInt2.size() << endl;
vecInt2.erase(vecInt2.begin()+3, vecInt2.end()-3);
cout << "vecInt2 after Erase: "; PrintVector(vecInt2);
}
// size()
{
cout << "vecInt2 size: " << vecInt2.size() << endl;
}
// capacity()
{
cout << "vecInt2 Capacity: " << vecInt2.capacity() << endl;
}
// max_size()
{
cout << "vecInt2 Max size: " << vecInt2.max_size() << endl;
}
INT_VEC vecInt3(vecInt2);
cout << "vecInt3(vecInt2): "; PrintVector(vecInt3);
// insert()
{
vecInt3.insert(vecInt3.begin(), vecInt1.begin(), vecInt1.end()-1);
cout << "vecInt1 after Insert: "; PrintVector(vecInt1);
cout << "vecInt3 after Insert: "; PrintVector(vecInt3);
}
// reverse()
{
cout << "vecInt3 Reverse: "; PrintVectorReversse(vecInt3);
}
INT_VEC vecInt4(vecInt3.begin()+2, vecInt3.end()-5);
cout << "vecInt4(vecInt3.begin()+2, vecInt3.end()-5): "; PrintVector(vecInt4);
// assign()
{
vecInt4.assign(4, 7);
cout << "vecInt4 after Assign: "; PrintVector(vecInt4);
}
// pop_back() & push_back()
{
vecInt4.pop_back();
cout << "vecInt4 after Pop_Back: "; PrintVector(vecInt4);
vecInt4.push_back(8);
cout << "vecInt4 after Push_Back: "; PrintVector(vecInt4);
}
// at() & operator[] - Get Value
{
cout << "vecInt4 first elem: " << vecInt4.at(0) << endl;
cout << "vecInt3 first elem: " << vecInt3[0] << endl;
}
// operator cmp
{
cout << "vecInt4 == vecInt3?: " << boolalpha << (vecInt4 == vecInt3) << endl;
cout << "vecInt4 < vecInt3?: " << boolalpha << (vecInt4 < vecInt3) << endl;
}
// swap()
{
vecInt4.swap(vecInt3);
cout << "vecInt4 after Swap: "; PrintVector(vecInt4);
cout << "vecInt3 after Swap: "; PrintVector(vecInt3);
}
// front() & back()
{
cout << "vecInt4 front: " << vecInt4.front() << endl;
cout << "vecInt4 back: " << vecInt4.back() << endl;
}
// empty()
{
cout << "vecInt4 Empty?: " << boolalpha << vecInt4.empty() << endl;
}
// clear()
{
vecInt4.clear();
cout << "vecInt4 after Clear: "; PrintVector(vecInt4);
cout << "vecInt4 size: " << vecInt4.size() << endl;
cout << "vecInt4 Empty?: " << boolalpha << vecInt4.empty() << endl;
}
system("pause");
}