stltest.cpp

STL的一些技巧例子。

#include "STLTest.h"
 
vector<int> intVector(100);


struct STL_Group
{
	CString Sname;
	int iNUm;
	char * NUm;
};
 
int Test_Remove_if() 
{
	vector<CString> vs(10,"12345哈哈");
	FindStr fs;
	fs.iMode = FM_IS;

	fs.szMatchStr = "哈哈";

	for(int i=0;i!=vs.size();++i)
	{
		cout << "前Test_Remove_if():" <<  vs[i]  << endl;
	}
 
	vs.erase(std::remove_if(vs.begin(), vs.end(), FindMatchingString(&fs)), vs.end());

	for(int i=0;i!=vs.size();++i)
	{
		cout << "后Test_Remove_if():" <<  vs[i] << endl;
	}

	return 0;
}

void Test_ZipVector()
{
	vector<CString> v(1000);
	vector<CString> vNew(v);


	cout << v.size();

	for(int i=0;i!=7;i++)
	{
		v[i]="ss";
	}

	cout << vNew.capacity();

	vector<CString>(vNew).swap(v);
	

}

void Test_StdAt(int iAt)
{
	vector< int > ivec;

	ivec.reserve(20);


	for(int i=0;i!=12;i++)
		ivec.push_back(i);


	try
	{
		cout << ivec.at(iAt) << endl;
		cout << ivec.operator [](iAt)   ;
	}
	catch (const exception& e)
	{
		cout << e.what();
	}



}

void Test_Swap()
{
	std::vector<int> v;
	std::vector<int>  v1(10,7);

	v.reserve(100);

	for(int i=0;i!=v1.size();i++)
	{
		cout << "Test_Swap():" << v1[i] << endl;
	}

	v.push_back(111);
	v.push_back(222);
	v.push_back(333);
	v.push_back(444);
	v.push_back(555);
	v.push_back(666);
	v.push_back(777);

	v1.swap(v);

	for(int i=0;i!=v1.size();i++)
	{
		cout << "Test_Swap():" << v1[i] << endl;
	}


	//试验
	std::vector<int> _Tlist;  
	_Tlist.reserve(10);  
	for(int   i   =   0;   i   <   10;   ++i){
		_Tlist.push_back(i);  
	}  

	for(int i=0;i!=_Tlist.size();i++)
	{
		cout << "resize前Test_Swap():" << _Tlist[i] << endl;
	}
	//   do   something  

	_Tlist.resize(0);  
	for(int   i   =   0;   i   <   20;   ++i){  
		_Tlist.push_back(i);  
	} 

	for(int i=0;i!=_Tlist.size();i++)
	{
		cout << "resize后Test_Swap():" << _Tlist[i] << endl;
	}
	system("pause");
}



int  main()
{
	vector<STL_Group> Svec;
	STL_Group TempGroup;
	int iTemp;

	vector<int> v;
//	v.reserve(10);


	char a[] = "hello world";
	char *pi = a;
	cout<< sizeof(a) << endl; // 12字节
	cout<< sizeof(pi) << endl; // 4字节

	a[0] = 'X';
	cout << a << endl;
	system("pause");
	char *p = "world"; 
	p[0] = 'X'; //无效

	
	cout << "char[size]:" << sizeof(char) << endl;
	cout << "int[size]:" << sizeof(int) << endl;
	cout << "unsigned int[size]:" << sizeof(unsigned int) << endl;
	cout << "long[size]:" << sizeof(long) << endl;
	cout << "unsigned long[size]:" << sizeof(unsigned long) << endl;
	cout << "float[size]:" << sizeof(float) << endl;
	cout << "double[size]:" << sizeof(double) << endl;
	cout << "void *[size]:" << sizeof(void *) << endl;
	

	cout << p << endl;
	system("pause");


	Test_Swap();

	//高效拷贝文件一个一个字符串到fileData中
	//ifstream inputFile("interestingData.txt");
	//string fileData((istreambuf_iterator<char>(inputFile)),
	//	istreambuf_iterator<char>());

	cout << v.size() << endl;
	for(int i=0; i<100; i++)
	{ 
		v.push_back(i);
	}
	v.push_back(2);
	v.push_back(12);
	v.push_back(222);
	v.push_back(15);

	cout << v.size() << endl;
	//测试删除
	if(v.size()>=83)
		v.erase(v.begin(), v.begin()+83);
	else
		cout << "超界！！" << endl;


	if(v.size()>=21
		)
	{
		for(int i=0; i<21; i++)
		{
			cout << "元素内容："  << v.at(i) << endl;
		}
	}

	cout << v.size() << endl;


	system("pause");

	for(int i=0; i<100; i++)
	{
		v.push_back(i);
	}

	cout << v.size() << endl;


	system("pause");
	
	cout << "v的max_size:" << v.max_size() << "v1的值:"<< v[2]  << endl ;

	v.reserve(122);
	cout << "v的max_size:" << v.max_size() << "v1的值:"<< v[2]  << endl ;
	cout << v.size() << endl;

	cout << "测试at函数: " ;
	cin >> iTemp;

	Test_StdAt(iTemp);

	system("pause");

	Test_Remove_if();

	system("pause");
	Test_ZipVector();

	system("pause");



	system("pause");

	TempGroup.iNUm=1;
	TempGroup.NUm="";

//	TempGroup.Sname

//	Svec.push_back();

  intVector[21] = 50;
  vector<int>::iterator intIter = find(intVector.begin(), intVector.end(), 50);

  if (intIter != intVector.end())
    cout << "Vector contains value " << *intIter << endl;
  else
    cout << "Vector does not contain 50" << endl;

   system("pause");



  return 0;
}