W3School TIY Editor

#include <iostream> #include <vector> #include <algorithm> using namespace std; bool greater_than_5(int value) { return value > 5; } int main() { vector<int> numbers = {1, 7, 3, 5, 9, 2}; auto it = find_if_not(numbers.begin(), numbers.end(), greater_than_5); if (it != numbers.end()) { cout << "数字 " << *it << " 不大于 5。"; } else { cout << "所有数字都大于 5。"; } return 0; }