STL算法库（2）

//排序算法
//sort, random_shuffle
#include 
#include 
#include 
#include 
class Myprint
{
public:
	void operator()(int val)
	{
		cout << val << " ";
	}
};
void test5()
{
	vector v;
	v.push_back(10);
	v.push_back(100);
	v.push_back(30);
	v.push_back(40);
	//没有排序前打印数据
	for_each(v.begin(), v.end(), Myprint());
	cout << endl;
	//排序
	sort(v.begin(), v.end(), less());
	//排序后打印
	for_each(v.begin(), v.end(), Myprint());
	cout << endl;
	//洗牌
	random_shuffle(v.begin(), v.end());
	for_each(v.begin(), v.end(), Myprint());
}


//拷贝和替换
//copy, replace, replace_if, swap
class MyPrint
{
public:
	void operator()(int val)
	{
		cout << val << " ";
	}
};
class Less100
{
public:
	bool operator()(int val)
	{
		return val < 100;
	}
};
void test6()
{
	vector v;
	for (int i = 0; i < 10; i++)
	{
		v.push_back(i + 10);
	}
	vector vtarget;
	vtarget.resize(v.size());
	copy(v.begin(), v.begin() + 5, vtarget.begin());
	for_each(vtarget.begin(), vtarget.end(), MyPrint());
	cout << endl;
	replace(vtarget.begin(), vtarget.end(), 0, 100);				//将0替换成100
	for_each(vtarget.begin(), vtarget.end(), MyPrint());
	cout << endl;
	replace_if(vtarget.begin(), vtarget.end(), Less100(), 2000);				//Less100()谓词，replace_if条件替换，将小于100的原元素替换成2000
	for_each(vtarget.begin(), vtarget.end(), MyPrint());
	cout << endl;
}


int main()
{
	
	//srand((unsigned int)time(NULL));
	//test5();
	test6();

	system("pause");
	return 0;
}