W3School TIY Editor

#include <iostream> #include <vector> #include <algorithm> using namespace std; int main() { vector<int> numbers = {1, 7, 3, 5, 9, 2}; auto it = find(numbers.begin(), numbers.end(), 3); if (it != numbers.end()) { cout << "找到数字 3！"; } else { cout << "未找到数字 3。"; } return 0; }