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1.sort()
void MyPrint(int val) { cout << val << " "; } void test01() { vector<int> v1; v1.push_back(10); v1.push_back(20); v1.push_back(40); v1.push_back(30); v1.push_back(20); v1.push_back(40); v1.push_back(50); sort(v1.begin(), v1.end(), greater<int>());//用内建函数模板实现降序 for_each(v1.begin(), v1.end(), MyPrint); cout << endl; }2.random_shuffle()//随机打乱顺序
void MyPrint(int val) { cout << val << " "; } void test01() { vector<int> v1; srand((unsigned int)time(NULL));//随机数种子 for (int i = 0; i < 10; i++) { v1.push_back(i); } for_each(v1.begin(), v1.end(), MyPrint); cout << endl; cout << "随机打乱顺序后" << endl; random_shuffle(v1.begin(), v1.end());//随机打乱顺序 for_each(v1.begin(), v1.end(), MyPrint); cout << endl; }3.merge()//归并
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 + 1); } vector<int> v3; v3.resize(v1.size() + v2.size());//归并前必须先开辟空间 merge(v1.begin(), v1.end(), v2.begin(), v2.end(), v3.begin());//必须是有序且升序 for_each(v3.begin(), v3.end(), MyPrint); cout << endl; }4.reverse()//反转
void MyPrint(int val) { cout << val << " "; } void test01() { vector<int> v1; for (int i = 0; i < 10; i++) { v1.push_back(i); } cout << "反转前：" << endl; for_each(v1.begin(), v1.end(), MyPrint); cout << endl; reverse(v1.begin(), v1.end());//实现反转 cout << "反转后：" << endl; for_each(v1.begin(), v1.end(), MyPrint); cout << endl; }