C++ std::set 取第一个元素

Posted 2021-11-01 软件工程小施同学

#include <iostream>
#include <set>

using namespace std;

int main()
{
	
    // cbegin/cend(c++11): Returns a const_iterator pointing to the first element in the container/
	// Returns a const_iterator pointing to the past-the-end element in the container
	std::set<int> myset = { 50, 20, 60, 10, 25 };
 
	std::cout << "myset contains:";
	for (auto it = myset.cbegin(); it != myset.cend(); ++it)
		std::cout << ' ' << *it;
 
	std::cout << '\\n';

	system("pause");
	return 0;
}