Tập hợp nhiều là một loại vùng chứa kết hợp trong đó có nhiều phần tử có thể có các giá trị giống nhau.
Chức năng và mô tả:
Các hàmFunctions are used here: ms.size() = Returns the size of multiset. ms.insert) = It is used to insert elements to the multiset. ms.erase() = Removes the value from the multiset. ms.find() = Returns an iterator to the search element in the multiset if found, else returns the iterator to end. ms.count() = Returns the number of matches element in the multiset. ms.begin() = Returns an iterator to the first element in the multiset. ms.end() = Returns an iterator to the last element in the multiset
Mã mẫu
#include<iostream> #include <set> #include <string> #include <cstdlib> using namespace std; int main() { multiset<int> ms; multiset<int>::iterator it, it1; int c, i; while (1) { cout<<"1.Size of the Multiset"<<endl; cout<<"2.Insert Element into the Multiset"<<endl; cout<<"3.Delete Element from the Multiset"<<endl; cout<<"4.Find Element in a Multiset"<<endl; cout<<"5.Count Elements with a specific key"<<endl; cout<<"6.Display Multiset"<<endl; cout<<"7.Exit"<<endl; cout<<"Enter your Choice: "; cin>>c; switch(c) { case 1: cout<<"Size of the Multiset: "<<ms.size()<<endl; break; case 2: cout<<"Enter value to be inserted: "; cin>>i; if (ms.empty()) it1 = ms.insert(i); else it1 = ms.insert(it1, i); break; case 3: cout<<"Enter value to be deleted: "; cin>>i; ms.erase(i); break; case 4: cout<<"Enter element to find "; cin>>i; it = ms.find(i); if (it != ms.end()) cout<<"Element found"<<endl; else cout<<"Element not found"<<endl; break; case 5: cout<<"Enter element to be counted: "; cin>>i; cout<<i<<" appears "<<ms.count(i)<<" times."<<endl; break; case 6: cout<<"Elements of the Multiset: "; for (it = ms.begin(); it != ms.end(); it++) cout<<*it<<" "; cout<<endl; break; case 7: exit(1); break; default: cout<<"Wrong Choice"<<endl; } } return 0; }
Đầu ra
1.Size of the Multiset 2.Insert Element into the Multiset 3.Delete Element from the Multiset 4.Find Element in a Multiset 5.Count Elements with a specific key 6.Display Multiset 7.Exit Enter your Choice: 1 Size of the Multiset: 0 1.Size of the Multiset 2.Insert Element into the Multiset 3.Delete Element from the Multiset 4.Find Element in a Multiset 5.Count Elements with a specific key 6.Display Multiset 7.Exit Enter your Choice: 2 Enter value to be inserted: 1 1.Size of the Multiset 2.Insert Element into the Multiset 3.Delete Element from the Multiset 4.Find Element in a Multiset 5.Count Elements with a specific key 6.Display Multiset 7.Exit Enter your Choice: 2 Enter value to be inserted: 2 1.Size of the Multiset 2.Insert Element into the Multiset 3.Delete Element from the Multiset 4.Find Element in a Multiset 5.Count Elements with a specific key 6.Display Multiset 7.Exit Enter your Choice: 2 Enter value to be inserted: 3 1.Size of the Multiset 2.Insert Element into the Multiset 3.Delete Element from the Multiset 4.Find Element in a Multiset 5.Count Elements with a specific key 6.Display Multiset 7.Exit Enter your Choice: 2 Enter value to be inserted: 4 1.Size of the Multiset 2.Insert Element into the Multiset 3.Delete Element from the Multiset 4.Find Element in a Multiset 5.Count Elements with a specific key 6.Display Multiset 7.Exit Enter your Choice: 6 Elements of the Multiset: 1 2 3 4 1.Size of the Multiset 2.Insert Element into the Multiset 3.Delete Element from the Multiset 4.Find Element in a Multiset 5.Count Elements with a specific key 6.Display Multiset 7.Exit Enter your Choice: 3 Enter value to be deleted: 4 1.Size of the Multiset 2.Insert Element into the Multiset 3.Delete Element from the Multiset 4.Find Element in a Multiset 5.Count Elements with a specific key 6.Display Multiset 7.Exit Enter your Choice: 4 Enter element to find 1 Element found 1.Size of the Multiset 2.Insert Element into the Multiset 3.Delete Element from the Multiset 4.Find Element in a Multiset 5.Count Elements with a specific key 6.Display Multiset 7.Exit Enter your Choice: 5 Enter element to be counted: 2 2 appears 1 times. 1.Size of the Multiset 2.Insert Element into the Multiset 3.Delete Element from the Multiset 4.Find Element in a Multiset 5.Count Elements with a specific key 6.Display Multiset 7.Exit Enter your Choice: 7 Exit code: 1