在向量C++中插入之前验证用户输入

#include <iostream>
#include <vector>
#include <string>
#include <sstream>

bool isValidInteger(const std::string& input) {
    std::istringstream iss(input);
    int num;
    return (iss >> num) && (iss.eof());
}

int main() {
    std::vector<int> numbers;
    std::string input;

    std::cout << "请输入整数（输入 'done' 结束）：" << std::endl;

    while (true) {
        std::cin >> input;
        if (input == "done") {
            break;
        }
        if (isValidInteger(input)) {
            numbers.push_back(std::stoi(input));
        } else {
            std::cout << "无效输入，请输入一个整数。" << std::endl;
        }
    }

    std::cout << "插入的整数为：" << std::endl;
    for (int num : numbers) {
        std::cout << num << " ";
    }
    std::cout << std::endl;

    return 0;
}