example3_error_handling_input_validation.cpp

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#include <iostream>
#include <limits>

int main() {
    int number;

    while (true) {
        std::cout << "Enter a positive integer: ";
        if (std::cin >> number) {
            if (number > 0) {
                break;
            } else {
                std::cout << "Please enter a positive number." << std::endl;
            }
        } else {
            std::cin.clear(); // Clear error flags
            std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n'); // Discard invalid input
            std::cout << "Invalid input. Please enter a number." << std::endl;
        }
    }

    std::cout << "You entered: " << number << std::endl;

    return 0;
}