[C++STL]常用集合算法

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代码如下:

#include <iostream>
#include <vector>
#include <numeric>
#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 + 5);}for_each(v1.begin(), v1.end(), myPrint());cout << endl;for_each(v2.begin(), v2.end(), myPrint());cout << endl;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;
}

测试结果:

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总结：
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代码如下:

#include <iostream>
#include <vector>
#include <numeric>
#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 + 5);}for_each(v1.begin(), v1.end(), myPrint());cout << endl;for_each(v2.begin(), v2.end(), myPrint());cout << endl;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;
}

测试结果:

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总结:
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代码如下:

#include <iostream>
#include <vector>
#include <numeric>
#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 + 5);}for_each(v1.begin(), v1.end(), myPrint());cout << endl;for_each(v2.begin(), v2.end(), myPrint());cout << endl;vector<int >v3;v3.resize(max(v1.size() , v2.size()));//v1和v2的差集vector<int>::iterator itEnd = set_difference(v1.begin(), v1.end(), v2.begin(), v2.end(), v3.begin());for_each(v3.begin(), itEnd, myPrint());cout << endl;cout << "---------------------------------------" << endl;//v2和v1的差集vector<int>::iterator itEnd02 = set_difference(v2.begin(), v2.end(), v1.begin(), v1.end(), v3.begin());for_each(v3.begin(), itEnd02, myPrint());cout << endl;}int main()
{test01();return 0;
}