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问题:

解答:
main.cpp

#include <iostream>
#include <set>
#include <string>
using namespace std;

int main()
{
	set<string> Mat_set, Pat_set, Guest_set;
	cout << "Enter Mat's friends(q to quit): ";
	string name;
	while (getline(cin,name)&&name!="q")
	{
		Mat_set.insert(name);
		cout << "Enter Mat's friends(q to quit): ";
	}
	cout << "\nMat's friends are: \n";
	for (auto pd = Mat_set.begin(); pd != Mat_set.end(); pd++)
	{
		cout << *pd << " ";
	}

	cout << "\nEnter Pat's friends(q to quit): ";
	while (getline(cin, name) && name != "q")
	{
		Pat_set.insert(name);
		cout << "Enter Pat's friends(q to quit): ";
	}
	cout << "\nPat's friends are: \n";
	for (auto pd = Pat_set.begin(); pd != Pat_set.end(); pd++)
	{
		cout << *pd << " ";
	}

	Guest_set.insert(Mat_set.begin(), Mat_set.end());
	Guest_set.insert(Pat_set.begin(), Pat_set.end());
	cout << "\n All friends are: \n";
	for (auto pd = Guest_set.begin(); pd != Guest_set.end(); pd++)
	{
		cout << *pd << " ";
	}

	return 0;
}

运行结果:

考查点:

• set关联容器
• 无重复
• 迭代器

2024年9月18日21:40:43