一、常用拷贝和替换算法

1.copy

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
void printVector(int val)
{
	cout << val << " ";
}
void test01()
{
	vector<int>v1;
	for (int i = 0; i < 10; i++)
	{
		v1.push_back(i);
	}
	vector<int>v2;
	v2.resize(v1.size());
	copy(v1.begin(), v1.end(), v2.begin());
	for_each(v2.begin(), v2.end(), printVector);
	cout << endl;
}
int main()
{
	test01();
	return 0;
}

2.replace

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
void printVector(int val)
{
	cout << val << " ";
}
void test01()
{
	vector<int>v1;
	for (int i = 0; i < 10; i++)
	{
		v1.push_back(i);
	}
	replace(v1.begin(), v1.end(), 5, 10);
	for_each(v1.begin(), v1.end(), printVector);
	cout << endl;
}
int main()
{
	test01();
	return 0;
}

3.replace_if

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
class MyPrint
{
public:
	void operator()(int val)
	{
		cout << val << " ";
	}
};
class Greater5
{
public:
	bool operator()(int val)
	{
		return val >= 5;
	}
};
void test01()
{
	vector<int>v1;
	for (int i = 0; i < 10; i++)
	{
		v1.push_back(i);
	}
	for_each(v1.begin(), v1.end(), MyPrint());
	cout << endl;

	replace_if(v1.begin(), v1.end(), Greater5(), 10);
	for_each(v1.begin(), v1.end(), MyPrint());
	cout << endl;
}
int main()
{
	test01();
	return 0;
}

4.swap

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
class MyPrint
{
public:
	void operator()(int val)
	{
		cout << val << " ";
	}
};
void test01()
{
	vector<int>v1;
	vector<int>v2;
	for (int i = 0; i < 10; i++)
	{
		v1.push_back(i);
		v2.push_back(i + 100);
	}
	for_each(v1.begin(), v1.end(), MyPrint());
	cout << endl;
	for_each(v2.begin(), v2.end(), MyPrint());
	cout << endl;

	swap(v1, v2);
	for_each(v1.begin(), v1.end(), MyPrint());
	cout << endl;
	for_each(v2.begin(), v2.end(), MyPrint());
	cout << endl;
}
int main()
{
	test01();
	return 0;
}

二、常用算数生成算法

1.accumulate

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
class MyPrint
{
public:
	void operator()(int val)
	{
		cout << val << " ";
	}
};
void test01()
{
	vector<int>v1;
	vector<int>v2;
	for (int i = 0; i <= 100; i++)
	{
		v1.push_back(i);
	}
	int total = accumulate(v1.begin(), v1.end(), 1000);//5050+1000
	//for_each(v1.begin(), v1.end(), MyPrint());
	cout << total << endl;
}
int main()
{
	test01();
	return 0;
}

2.fill

#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
using namespace std;
class MyPrint
{
public:
	void operator()(int val)
	{
		cout << val << " ";
	}
};
void test01()
{
	vector<int>v1;
	v1.resize(10);
	for_each(v1.begin(), v1.end(), MyPrint());
	cout << endl;
	fill(v1.begin(), v1.end(), 10);
	for_each(v1.begin(), v1.end(), MyPrint());
}
int main()
{
	test01();
	return 0;
}

三、常用集合算法

1.set_intersection

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
void MyPrint(int val)
{
	cout << val << " ";
}
void test01()
{
	vector<int>v1;
	vector<int>v2;
	for (int i = 0; i < 10; i++)
	{
		v1.push_back(i);
		v2.push_back(i + 5);
	}
	vector<int>v3;
	v3.resize(min(v1.size(), v2.size()));
	vector<int>::iterator itEnd = set_intersection(v1.begin(), v1.end(), v2.begin(), v2.end(), v3.begin());
	for_each(v3.begin(), itEnd, MyPrint);
	cout << endl;
}
int main()
{
	test01();
	return 0;
}

2.set_union

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
void MyPrint(int val)
{
	cout << val << " ";
}
void test01()
{
	vector<int>v1;
	vector<int>v2;
	for (int i = 0; i < 10; i++)
	{
		v1.push_back(i);
		v2.push_back(i + 5);
	}
	vector<int>v3;
	v3.resize(v1.size() + v2.size());
	vector<int>::iterator itEnd = set_union(v1.begin(), v1.end(), v2.begin(), v2.end(), v3.begin());
	for_each(v3.begin(), itEnd, MyPrint);
	cout << endl;
}
int main()
{
	test01();
	return 0;
}

3.set_difference

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
void MyPrint(int val)
{
	cout << val << " ";
}
void test01()
{
	vector<int>v1;
	vector<int>v2;
	for (int i = 0; i < 10; i++)
	{
		v1.push_back(i);
		v2.push_back(i + 5);
	}
	vector<int>v3;
	v3.resize(max(v1.size(), v2.size()));
	vector<int>::iterator itEnd = set_difference(v1.begin(), v1.end(), v2.begin(), v2.end(), v3.begin());
	for_each(v3.begin(), itEnd, MyPrint);
	cout << endl;
	vector<int>::iterator itEnd1 = set_difference(v2.begin(), v2.end(), v1.begin(), v1.end(), v3.begin());
	for_each(v3.begin(), itEnd1, MyPrint);
	cout << endl;
}
int main()
{
	test01();
	return 0;
}