[C++STL]常用拷貝和替換算法

代碼如下:

#include <iostream>
#include <algorithm>
#include <vector>
#include <ctime>
using namespace std;

void myPrint(int val)
{
	cout << val << " ";
}

void test01()
{
	vector<int>v1;
	for (int i = 0; i < 10; i++)
	{
		v1.push_back(i + 1);
	}
	vector<int>v2;
	v2.resize(v1.size());
	copy(v1.begin(), v1.end(), v2.begin());

	for_each(v2.begin(), v2.end(), myPrint);
	cout << endl;
}

int main()
{
	test01();
	return 0;
}

           

測試結果:

總結:

代碼如下:

#include <iostream>
#include <algorithm>
#include <vector>
#include <ctime>
using namespace std;

void myPrint(int val)
{
	cout << val << " ";
}

void test01()
{
	vector<int>v1;
	for (int i = 0; i < 10; i++)
	{
		v1.push_back(i + 1);
	}

	for_each(v1.begin(), v1.end(), myPrint);
	cout << endl;
	replace(v1.begin(), v1.end(), 2, 2000);

	for_each(v1.begin(), v1.end(), myPrint);
	cout << endl;
}

int main()
{
	test01();
	return 0;
}

           

測試結果:

總結:

代碼如下:

#include <iostream>
#include <algorithm>
#include <vector>
#include <ctime>
using namespace std;

void myPrint(int val)
{
	cout << val << " ";
}

class replaceGreater30
{
public:
	bool operator()(int val)
	{
		return val >= 30;
	}
};


void test01()
{
	vector<int>v1;
	for (int i = 20; i <= 40; i++)
	{
		v1.push_back(i + 1);
	}

	for_each(v1.begin(), v1.end(), myPrint);
	cout << endl;
	replace_if(v1.begin(), v1.end(), replaceGreater30(),3000);

	for_each(v1.begin(), v1.end(), myPrint);
	cout << endl;
}

int main()
{
	test01();
	return 0;
}

           

測試結果:

總結:

代碼如下:

#include <iostream>
#include <algorithm>
#include <vector>
#include <ctime>
using namespace std;

void myPrint(int val)
{
	cout << val << " ";
}

class replaceGreater30
{
public:
	bool operator()(int val)
	{
		return val >= 30;
	}
};


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;
	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;
}

           

測試結果:

總結: